Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2949a5022df0e2f…

MALICIOUS

PDF

77.5 KB Created: 2021-03-15 11:19:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4877ea49906f69c917824972c7f8351 SHA-1: 7510df10288e60b63a37cff84413989edf15db7e SHA-256: b2949a5022df0e2fd18fb6aa1f2de0cbaa813165239309bb6c922185933aba30
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a 'PDF_SEO_LINK_FARM'. The primary URL points to a site that appears to be part of a link farm, and another embedded URL is a PDF file hosted on a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/wix?keyword=lluvia+acida+formula
    • http://goxivomibivufuv.mywebcommunity.org/morrison_quimica_organica_descargar.pdf
    • https://static.s123-cdn-static.com/uploads/4391305/normal_5fe137b1dae0a.pdf
    • https://static.s123-cdn-static.com/uploads/4414847/normal_5fedb22c8c9fa.pdf
    • https://cdn.sqhk.co/vipujitebiki/aOeYgjb/popixaziwija.pdf
    • https://cdn.sqhk.co/xubupigegi/9mSVfh7/77620344456.pdf
    • https://cdn.sqhk.co/wirubetena/xaTiajj/44176599778.pdf
    • https://cdn.sqhk.co/lunemitibojo/IhfZDpf/43542011861.pdf
    • https://static.s123-cdn-static.com/uploads/4483354/normal_600581a8dd0b9.pdf
    • https://cdn.sqhk.co/paxepilekot/IrWjgid/physics_class_9_download.pdf
    • https://cdn.sqhk.co/sevimifogu/cZgeLqe/frisco_isd_high_school_course_guide.pdf
    • https://cdn.sqhk.co/divoxisig/wylxQja/zobizigowujedokuk.pdf
    • http://kupelobivinix.22web.org/21124179211.pdf
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5fdb7d4520230.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mexejuxoxaf.epizy.com/cnc_computer_numerical_control_programming_basics.pdf.pdf
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_11a0795e1a564a3fb2d5a6d29a8add13.pdf?index=true
    • https://94aa8f26-b07a-4c24-bdb4-4112657565c9.filesusr.com/ugd/37428b_2292af5aa6e24c48b96010f60809a1d4.pdf?index=true
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_a992c252ba6149788b10bbf32e8d42f4.pdf?index=true
    • https://5b5cf7c4-d983-4e27-bd54-44d52fc9074e.filesusr.com/ugd/2f9450_b22cb58b3adb4c378f0d99eec8971f39.pdf?index=true
    • http://nuwadolonopip.onlinewebshop.net/mipizigidunigusawa.pdf
    • http://poxalurerozelak.epizy.com/xagafedurarumadepizesan.pdf
    • http://denemarudibuwuz.rf.gd/jozodizuvaz.pdf
    • http://relumewamamit.rf.gd/resuxafovewevemuva.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f254.bin
1f3ab67f2dc1eb0aec1f6732234ee2129ae51004729ee5474ce952e0933f4188		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF254 4992 bytes
font_01_sfnt_off00010345.bin
41bf82d12e16362e0bd81bad593bf7c06a6f2a419b44d51a69e1cb6de6397409		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10345 10988 bytes

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