Malicious PDF — malware analysis report

Static analysis result for SHA-256 6721d0111d1c2c9a…

MALICIOUS

PDF

88.8 KB Created: 2021-05-18 16:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 318f580295a8d1f83f65c57a243356e7 SHA-1: 112f12dbb0e2fb9e21334b8bf9133961601556f0 SHA-256: 6721d0111d1c2c9af3b9724eb3f75fb5b25d47b28a15c1eb5080b412f9363ad1
156 Risk Score

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 0.9998

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://lozipotod.ru/strik?utm_term=kill+bill+vol+2+script+pdf+download+in+english PDF link annotation
    • https://lisebilapuwuw.weebly.com/uploads/1/3/4/0/134096741/kuput.pdfIn PDF document text
    • https://gagezomelebagam.weebly.com/uploads/1/3/1/6/131606069/xawurivanu.pdfIn PDF document text
    • https://papozigej.weebly.com/uploads/1/3/1/8/131858530/b2e04c2eec.pdfIn PDF document text
    • https://bitipares.weebly.com/uploads/1/3/1/3/131379103/ec0ab005.pdfIn PDF document text
    • https://gidisapawifo.weebly.com/uploads/1/3/4/6/134611794/xajefegatokap.pdfIn PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/sugimanu-nunaxoredutisep-dedunuvusej-ladamakufoxagi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/polexebuj/is_the_maze_runner_book_or_movie_better.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/n._o._v._a_2_game_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/13075044540.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/twilight_books_in_order_from_first_to_last.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/76913628377.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/how_to_make_him_chase_you_again_in_a_long_distance_relationship.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/12090326783.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/bhojpuri_gana_dj_music.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/the_servant_as_leader_robert_greenleaf_1970.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C51 5812 bytes
SHA-256: 418f3e8d2d50334439d10236dc2bed945a0a1d08ecd9b14f2a781c9127a9422c
font_01_sfnt_off0001302e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302E 11640 bytes
SHA-256: 91812a35b97c1ab7d18866f16f9a6dc161d777b36f63163b8413bc1e3c3ee91b

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