Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d3f1a28243fcf91…

MALICIOUS

PDF

73.1 KB Created: 2021-06-04 03:54:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 03bedf64437ac9bf2b9d2b4908804fe7 SHA-1: 534664ec99d54ae1efe23a6ad12e7095f23723a7 SHA-256: 6d3f1a28243fcf91d8be0e51af638bdb50c180eb4fdfbd5089d5e2805c1e5826
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://catamma.ru/pbw?utm_term=how+to+reset+adventure+capitalist+mobile PDF link annotation
    • https://xulijijexam.weebly.com/uploads/1/3/1/4/131453336/nizodefukodawobil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462046/normal_5fcc6a9637ac4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382430/normal_605f999edaefb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474978/normal_5fc6c27023d4d.pdfIn PDF document text
    • https://zepekerikolex.weebly.com/uploads/1/3/4/0/134017535/pixamasuxasabi.pdfIn PDF document text
    • https://gosedizomomusuw.weebly.com/uploads/1/3/4/3/134313056/babesavomawag-porerededomifo-damixus-gurezafevoliv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4c8a22a-1136-4d24-9250-1fd8b539615f/vemosupeferixotikagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc592a8-f7aa-4ad4-89c2-58614f50b0df/what_is_the_most_difficult_crochet_stitch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0250714-fba5-4996-9206-71d38f71899e/tecnicas_basicas_de_enfermeria_macmillan_2019_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c87878a-b598-4e2e-ad03-0295835501fc/tableau_edit_bookmark.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b3ec48b-061f-46c3-8566-89e630d090f7/bhagavad_gita_definition_hinduism.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/217756e9-ebb1-4dce-9fae-543fb346ef3d/the_wheel_of_time_book_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8db2a39-0df0-4121-bbc9-cba809b7ef80/vegafatamasilofogimakifit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25787a2c-d5ac-4e93-8855-77b753068c42/mojibufabikonebemomevubos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afa73840-3e42-4f1a-80a5-dae445a54bed/50180885606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c2067d-7cff-4041-8bf2-d4c49a071dbb/disorders_of_the_central_and_peripheral_nervous_system_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec79f1cb-dd36-4a3d-a326-4bdd2b6f70c9/what_are_some_good_female_dragon_names.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/594b4ee0-4363-4a2c-8b24-5f0cd23863ab/ingenuity_baby_bouncer_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a7d663c-bac9-41e8-879e-5aff3de9edf7/7828509950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b701384-8f90-467a-ab0e-ed964d1aac3d/nimizofulusipajidufiweren.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0121608-a3f3-4966-aac4-b6b060c25630/favuzuritutufo.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9C 5472 bytes
SHA-256: 03a20f0d57fb5f141f3861af7a8a0d4ce5817e516561addc1cc29a80ba018630
font_01_sfnt_off0000f031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF031 10968 bytes
SHA-256: dcce699f36f4c57acf486dc1a9a9cf10bab5c9e34b6952cb0600c4d2e31e807f

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