Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb5a26e4c1bce584…

MALICIOUS

PDF

95.4 KB Created: 2021-09-06 01:47:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 7daf5c9acb58e613f918d4d40a480d10 SHA-1: 3b48ee697248123e31002557ac166d9c71bd2a19 SHA-256: bb5a26e4c1bce58493d6b1843fb1bc962c2c88f69383f90338e19e580366d639
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which point to compromised WordPress sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure as a link farm suggests it's designed to redirect users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://jerseyshorepirates.com/userfiles/files/xoxixi.pdf In PDF document text
    • https://triosms.com/userfiles/file/sitabugotejefu.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/46903142863.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/d0d0446e099d753b8ed330afeac4cb47/firige.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/marimare.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/kexit.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1609e98c402fb5---kijowi.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/ab22beb2d452e33ffe88eeb00c699647/4224280210.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea9f45e413---lagukomuviwapoxab.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/jugasolusoxodoguw.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6bfd5d5c0---xevegisuwu.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3b341504b---86599807810.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/83648329756.pdfIn PDF document text
    • http://aven.su/userfiles/file/56118341694.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/nefojovipesebapuditenoli.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/aa9dej6u202gb6mnnl73s5uu1m/31957766378.pdfIn PDF document text
    • https://nepalonetours.com/userfiles/files/fanipajumafowu.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/xitixakiz.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/19029742569.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/32876cb3bc1f6756a50f1bde62205a78/3786828324.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/58010214094ec3bb4d83c39e59a140f4/kugekewemix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=taping+kinesiology+nalla+traumatologia+esportiva+pdfPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e90a306c3---32228683355.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABE 1868 bytes
SHA-256: b44e304f4199d162c520aa61e4565b27969aa952fa2ee1db3f4cf671ae1a9eb8
font_01_sfnt_off0000e370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE370 16728 bytes
SHA-256: 8e70c66de8e30618f21269b28d0161bac8de90aab391c1ad111cdf29d6a86921
font_02_sfnt_off0000fb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11373 25592 bytes
SHA-256: ee315905a6e0ba228f0dea8d80c69e97e062bd463197da10e7fdeb09fbb954e5
font_04_sfnt_off00015239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15239 11176 bytes
SHA-256: 00013394d32c56f2b3904694d9102e87044cf6a043530e6541d98b89ad21a854

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