Malicious PDF — malware analysis report

Static analysis result for SHA-256 798aacdefcd42a80…

MALICIOUS

PDF

78.9 KB Created: 2021-05-30 06:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 43b9e4703f35bb5bc11497f528adbb60 SHA-1: 26e3160b59093f4de23f3a6a14a81624c0a1641c SHA-256: 798aacdefcd42a809aa63ac151de865c385f9fb46773a54941756d583a6a6427
156 Risk Score

Malware Insights

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

The PDF file contains a lure for a free software download, directing users to a URL that appears to be part of a link farm. The PDF_SEO_LINK_FARM heuristic indicates a large number of external PDF links, suggesting a campaign to distribute malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=adobe+premiere+elements+free+download+full+version+crack+64+bit PDF link annotation
    • https://lidixegivutowo.weebly.com/uploads/1/3/1/4/131453330/gotaxifurij.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4368777/normal_60b1e3ce761a9.pdfIn PDF document text
    • https://vafubetuxako.weebly.com/uploads/1/3/4/5/134503762/tabiz-xoboronejiriva-weduwux-vaxoroxomak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370057/normal_5fd09f93e952b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470220/normal_5fd996056b243.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369786/normal_6033819eee44c.pdfIn PDF document text
    • https://natadafupekex.weebly.com/uploads/1/3/1/8/131856288/22e937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490528/normal_5fd31815706c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408483/normal_60661e5f62703.pdfIn PDF document text
    • https://pakipuxis.weebly.com/uploads/1/3/5/3/135347710/ec3d5669ae0a39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459027/normal_603977978caed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416789/normal_5fd1e606c230a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393197/normal_606e05c77e993.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/d54b49f8-fce1-48cc-ba81-a7162eaa2a35/fisag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a383e2a-91c3-4573-ae33-1742a12e22d0/how_to_turn_on_jenn_air_induction_cooktop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba97e9cb-a599-4acd-9eb5-3e7b9501ecff/88207629576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/def3f08f-5217-47cc-95db-9a6963923b97/86035745362.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/108ffca4-01ee-45a8-a001-31427e436eaf/does_the_university_of_puerto_rico_teach_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41f3fe83-4c27-4219-b402-af911eeacf84/57741933979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5851612-9a58-4e86-b725-d8b2b30d5531/whirlpool_dishwasher_wdt970sahz_parts_diagram.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_off0000f250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF250 5888 bytes
SHA-256: 6851bce98676e606365b60eabece6bebe9c048e6a572f7d66b8ff3b8fa55e635
font_01_sfnt_off00010665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10665 11512 bytes
SHA-256: 556488c679ed7384458309a8fd65f3584ddcbdc58f06a55f1f3f0887061c2f85

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