Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb22dbe5925103d0…

MALICIOUS

PDF

88.9 KB Created: 2021-07-22 05:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 670538291a6641ead7ed87fa1d152194 SHA-1: 3d34e0691b569b229609804fd34c2e27f320e4c2 SHA-256: eb22dbe5925103d0e9a12e0afbcc4588e8f9e6d05a67c2c4d194d925302c2db3
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or phishing pages. The presence of a link farm on disposable hosting further supports a malicious intent to distribute or host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bacc6b9466c---11756477114.pdf In PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/0973bc11965b902c189480eb97e57a49/zuxiwukokosesinonuvumarab.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/54225667343.pdfIn PDF document text
    • https://bancodevida.com/bancodevida/admin/images/image/file/99077290720.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1609739f3d080d---47356918178.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/42238903095.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/649ead09fbfcbba5720e3bca7f0b1d1c/72915795159.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/66929871926.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/58283119248.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/vebevufabotodugifowidulo.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/93101828557.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///60897574324.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/kuluvowutefukuwop.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c41cc45c069---50004104923.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/61221010971.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/zulapam.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e34651ac23d---40923658367.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/96036bb7a827e26b08949a07e9bec667/kojede.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/93ce2299ff14b5cae696833c370f61dc/63701071358.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/96045882331.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160e0e2f61244c---duvavoror.pdfIn PDF document text
    • http://simonide.org/userfiles/file/71501470528.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/17107922002.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/mu58i0utn6fj3e36veqlstbv73/gufisavotosirosodadifana.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=properties+and+conditions+for+kites+and+trapezoidsPDF 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_off0000f022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF022 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10839 10720 bytes
SHA-256: f2f064d14699ea7a21922a34aa4d45a55e52e6c471bdb26f020929ef8eab0de2
font_02_sfnt_off00012100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12100 19076 bytes
SHA-256: 02f30b05a089b5941790a5b41525a11288214519fe2e6e4f4e0835df98b8e985

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