Malicious PDF — malware analysis report

Static analysis result for SHA-256 6751d066027b2bff…

MALICIOUS

PDF

83.9 KB Created: 2021-09-03 00:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9e00bc18a42284bcee07ee7ace3e8930 SHA-1: 184955a9f5e73a569c69305bd92e364770626b5e SHA-256: 6751d066027b2bffa359db31aef79152a796fa06256c1907ca148805297d3091
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to external websites, many of which are hosted on compromised CMS upload directories or appear to be part of a link farm on disposable hosting. The document body is heavily obfuscated and unreadable, suggesting it is not intended for direct user interaction but rather to facilitate the distribution of malicious content via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://meble-tk.pl/userfiles/file/rovaturibafojokasale.pdf In PDF document text
    • https://viessmannboilers.ca/fck_upload/file/18996301353.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebe86b7edf---90441414837.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160d82d240afdc---sikam.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f63d53fe9b868cce39fe57ad7d5801bb/xexesupufet.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/dvfe16relfq2hptd7cbe3980m1/85768779173.pdfIn PDF document text
    • https://italvaping.com/file/duwomoretal.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/us6nm08uvg8uv6uvv37386gdei/40110572067.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/161010022caad6---vopidiwaxevosakeserom.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/xufilu.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/p9l96mfroop5hp7lplde1om7ls/860223038.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/dajitusefazatapedote.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/golewetuvusulelufo.pdfIn PDF document text
    • https://ijtm.in/userfiles/file/xerifazavegomawe.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078362405270---badanudodumojogodoju.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/mewonesibupupab.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/mamagorefu.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/74965956521.pdfIn PDF document text
    • https://groupburuemas2.com/contents//files/lixesuw.pdfIn PDF document text
    • http://mooneyes.pl/userfiles/file/baloxidepimuzutexemosewe.pdfIn PDF document text
    • http://aptwash.com/userData/ebizro_board/file/13960539271.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/lefavabozeretu.pdfIn PDF document text
    • http://masonfamilyreunion.org/clients/b/bd/bdaf0a3c19eb5f10f0519c747c117e37/File/topitekarupijerenu.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/lamorufonuwuvifenomajewos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=crane+elephant+humidifier+manualPDF link annotation
    • 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_off0000e318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE318 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB2A 17940 bytes
SHA-256: c2d497a9cd9d702092b1c38306c07cf69ad9fedffab707c8d0d753d140ee66dc
font_02_sfnt_off000129fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FD 10608 bytes
SHA-256: e2e1981fed70f924bf0064137b21e37fd82c52312431b695611c4d588b85fae0

Open this report in the interactive analyzer, or submit your own file for analysis.