Malicious PDF — malware analysis report

Static analysis result for SHA-256 943f17a27905ba40…

MALICIOUS

PDF

105.2 KB Created: 2021-05-04 03:48:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfa9bb514b5c190d307ebd7aabf121db SHA-1: 9263313fa958c8a53645b575e17664241c91c0d4 SHA-256: 943f17a27905ba40e57f51068a1986ef0ce63da89898103d3d9637d893427d51
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to PDF files with numeric slugs, suggesting a link farm for SEO manipulation or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or trojan delivery. The embedded URL 'https://jumiwimov.ru/strik?utm_term=fifty+shades+of+grey+darker+full+movie+2016+download+filmywap' is a clear indicator of a lure, attempting to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=fifty+shades+of+grey+darker+full+movie+2016+download+filmywap
    • http://tometifo.getenjoyment.net/27196555603.pdf
    • https://tedarotola.weebly.com/uploads/1/3/1/4/131482933/jazofilif_kudafoxid.pdf
    • http://ryukzak.digital/best_thermodynamics_book_for_mechanical_engineeringtetou.pdf
    • https://fojefutitamok.weebly.com/uploads/1/3/3/9/133989463/7659956.pdf
    • http://sushibara.net/166738259653w4rz.pdf
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/edd3b276db53.pdf
    • https://xubedemowixur.weebly.com/uploads/1/3/6/0/136004279/766778.pdf
    • http://itfamily.info/59096264661okklb.pdf
    • http://asta-stroy.ru/sketchup_free_tutorials_2020ps8ph.pdf
    • http://bigswinner.space/calculus_early_transcendentals_6th_edition_larsonnwmjh.pdf
    • https://vezitiratad.weebly.com/uploads/1/3/1/8/131856143/pubukuf.pdf
    • http://kelnoteres.xyz/56128620380dpzg6.pdf
    • http://lnstgramhelpcopyright.com/55912856160vo1lk.pdf
    • http://bottlechainworld.com/will_covid_brain_fog_go_awayl234j.pdf
    • https://jepemanek.weebly.com/uploads/1/3/4/5/134589705/2374441.pdf
    • http://supfitket.buzz/81883225876ihz0j.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fuvarijes.atwebpages.com/tosuxeponug.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014a41.bin
20495363d64fbbeed74da196e101479c76a41d1e67c0b784c580f7208f9a8147		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A41 6088 bytes
font_01_sfnt_off00015ef6.bin
5ec0b3381af093d12a71a48d465d7e922720dcded84b495925aab0d0ea0859e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15EF6 11644 bytes
font_02_sfnt_off0001867e.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1867E 4324 bytes

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