Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e38c0c318073fad…

MALICIOUS

PDF

85.3 KB Created: 2021-09-01 19:11:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: eb9ef8487d1e2a9b5bc81b6569d50019 SHA-1: 2eb15f165138693472487789937b2d09a8522b4b SHA-256: 0e38c0c318073fad1a2fd55a7f414e822bb3ed50cfefbe7b1d13a1cee55819c2
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://pixomot.ru/uplcv?utm_term=net+present+value+simple+example PDF link annotation
    • http://marthomaiticherukole.com/userfiles/file/wakige.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7bdbc3c1a1---59058192567.pdfIn PDF document text
    • http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12352635829.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/0613f9ca23b82a27f84df69a3dbddf4b/50968317772.pdfIn PDF document text
    • https://fultoys.com/userfiles/gobopasivujapesoxudote.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/28923270581.pdfIn PDF document text
    • http://rideco.hu/upload/file/96274360280.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/tunosexufiforijexekino.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/8e95df3674d3986099dd5d7b60f1f1f9/30692115034.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/88664670049.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/vuwutenibidipafigu.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/24205227804.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/a896d065f8dd9bb1460aed1e35eb4cdc/71102818922.pdfIn PDF document text
    • http://schokobrunnen.com/idata/88329352576.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/550fe10ad67d96d6bab71dee6b0e8b56/vikavurofedosuzijinigogig.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607158981804a---18553555582.pdfIn PDF document text
    • http://aimic.com/userfiles/file/81030375504.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/f498f4b3f145628c6f91947d6e881591/mopesuguw.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/l7643t535k5sc65u0i587kjp7n/6875718535.pdfIn PDF document text
    • https://standardpromotion.com/images/upload/userfiles/files/97690251075.pdfIn PDF document text
    • http://sassyissy.com/survey/userfiles/files/bemuxagusakaw.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077aaf4c659a---rokejekox.pdfIn PDF document text
    • http://pure-chiral.com/upload/files/miwefegadexede.pdfIn PDF document text
    • https://equinox-e.com/upload/UserFiles/file/munage.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/19590812053.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/b64f0b629215e1f2135312cfcbd523dc/35059474423.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_off0000e7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F3 10540 bytes
SHA-256: f909f478275ebd3e21ee70781808608b3a86586e537f7c8381a48a54c55c977d
font_01_sfnt_off0000fff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001180b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1180B 18004 bytes
SHA-256: 079be3ce0cfa1786cf903bfa3fcf056767a06acb8b3baa7150d88c517460b750

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