Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e57acb0ab0bbd00…

MALICIOUS

PDF

87.1 KB Created: 2021-06-30 07:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 974b211b958d3c6fa50b029da3e28dcc SHA-1: fdf5268e8b75672eb87c5055efc60487f95f8b66 SHA-256: 2e57acb0ab0bbd004e4ab482a1e2fdd157174a418b41e3ac5fa0a5f59fc7b94b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute phishing content or further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the non-clustered nature of these links on disposable hosting, reinforcing the phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://huntic.ru/uplcv?utm_term=how+to+force+reset+iphone PDF link annotation
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/05c84a7dc230223890cbabffcd08c07e/tiwomote.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/bewinolafojuke.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c561bd067---74971577696.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0ed7bf458---wulukesariraxafosojonika.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4616975c8c---90845954851.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e293bd2d9f---xaxuvijesivij.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/8ecphobta03mishfqhgvrho31d/32528668156.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/19638106841.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/10ucnimvu38v9frboiilb3ij0e/26940303736.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c202882dc58---98469883443.pdfIn PDF document text
    • https://taevlingar.se/images/pages/file/82200867274.pdfIn PDF document text
    • http://rubensova16.cz/files/file/tixamitosavubo.pdfIn PDF document text
    • http://kopdesign.nl/userfiles/file/nopigem.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093036addaf5---fomutefoxufade.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/46476609365.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/0emrpr8pqadec5858vcghsbl9i/90344816722.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/39423329586.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/0393c806ba39a0117ae85bd890a39071/zigumotejokitejejusejegeb.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/c95aa782831c57b6573ce41a85a949ed/79158353208.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb9f9433f0---vetifibaxagubefiju.pdfIn PDF document text
    • https://gikguamerica.com/userfiles/file/53860803786.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0b5173ef0f628793fd07b59e7d8e27e9/55579748400.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/mlistfdi99fnae1jj3tgou5sf3/pofunonineginibaxevuwug.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/c820314e565538af4131c7586fb42260/38632546632.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090387f9de11---30058399373.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160806f0bbedf8---rubuvalefejufakiko.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160764c0f99241---67595285783.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b670a5afc---difafitaxuverufororur.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF323 10444 bytes
SHA-256: 21513d29a293589b0f7ed29c6423321cca63cb18af725d76452c31d489225db3
font_01_sfnt_off00010acf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ACF 17044 bytes
SHA-256: 1157fefd6bc47229a6e36b8a7afe1f40e4435def60954fcead0b16040205988f
font_02_sfnt_off00013713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13713 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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