Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9bcbf21b0b3dd3…

MALICIOUS

PDF

113.8 KB Created: 2021-05-19 14:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ed227fd67f13a38296a710a9e73d5caf SHA-1: fdadac7c358d5bd535665e75809bae7ecb6e8311 SHA-256: 0c9bcbf21b0b3dd366b6e1ba2f2572221a59516148dfe3ecd0606646396e714a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the presence of external URLs and the nature of the heuristics point towards a malicious document, likely used for phishing or SEO abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://bologen.ru/strik?utm_term=super+mario+64+rom+hack+maker PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379736/normal_605b729120631.pdfIn PDF document text
    • https://rigivopamakor.weebly.com/uploads/1/3/4/8/134869382/6511b3f769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453908/normal_6041891338440.pdfIn PDF document text
    • https://xefinaloze.weebly.com/uploads/1/3/2/8/132814425/4480331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421214/normal_600c207c6718b.pdfIn PDF document text
    • https://zawuziwoju.weebly.com/uploads/1/3/1/6/131636930/lapadunanosip-jategalixaja.pdfIn PDF document text
    • https://wunabigoji.weebly.com/uploads/1/3/4/8/134891590/4017591.pdfIn PDF document text
    • https://gubaxuxozixiviw.weebly.com/uploads/1/3/1/3/131383744/53b302b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5fd24b9493d4d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/133b77a5-dd2d-492e-b665-3c779c43baf1/situgolemulobu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da9f84b7-4230-4e14-ba2e-57248aa9fc0d/what_was_the_purpose_of_the_pyramids_brainly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27a6892d-0b77-4dc5-8b42-21700c8aa30d/kuranek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d61e48a-4620-46ab-83cb-6dd6de33e9f3/sennheiser_rs-175_wireless_headphones_and_receiver_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3626b0e0-b6a5-4d54-9f1d-cf0e885b2d78/64211353576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b113ec-d0a4-4f1b-a3aa-a45c84115e12/17160699979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/068ee1d5-aba5-4756-ab48-3d4d297635d3/what_do_us_bank_checks_look_like.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db6320ef-819e-4742-8f86-e7f23b7c0d9d/2005_cadillac_cts_transmission.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d96c9c9b-52ed-4370-ab44-7187601b2e6c/how_to_become_a_health_and_safety_officer_nz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eba8d814-f28d-4eb9-b7fd-66666541e452/44588531560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d674da0-f483-4860-824b-99f13ed9385e/learn_to_read_tarot_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19d9cbb8-2bd4-4475-98ae-46794b455a4b/spelljammer_ships.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/877e8b7e-1b69-4f1b-8e21-33a91dbbdfcb/dunidajikamedipamexiket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c61629ff-6be5-4309-885c-8b9ca10cdfa9/82679930542.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014b91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B91 3876 bytes
SHA-256: 61fc3028875969d86d095f0709724631c7b3832d9db740b9e87b3b7ff09f6080
font_01_sfnt_off00015952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15952 5068 bytes
SHA-256: 2824fa1136c5655cf6c2da8d91d9d2a3ce417906e0592d9f4c8333faaf5c0aed
font_02_sfnt_off00016a87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A87 13364 bytes
SHA-256: 38b9fd7d42c40fc14c160912be0d9bd2e297246bc45368e287c0528428862cab
font_03_sfnt_off00019598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19598 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
font_04_sfnt_off0001aa5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA5F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176