Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e0c962aa8f85bcb…

MALICIOUS

PDF

79.4 KB Created: 2021-03-03 10:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6f3589fabb62986e29bb52fe39caf4e2 SHA-1: e715c13b146f2bc3ce58b7cfbc00757e428dd3e2 SHA-256: 8e0c962aa8f85bcbd9a1e29415fae5b2c07f58d9abbe9dc2855668bf32a97f90
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to distribute malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML classifier score further indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure for movie downloads, likely leading to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=the+hobbit+2+movie+download+in+hindi+720p+hd PDF link annotation
    • http://steel-lipetsk.ru/transcribed_trumpet_solos7coo1.pdfIn PDF document text
    • http://prizinsta24.space/nclex_exam_book6pwks.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/h6Qhfjh/word_collect_answers_level_1700.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/jtAfBih/abandoned_jurassic_world_fallen_kingdom_for_mcpe.pdfIn PDF document text
    • https://kixifosesezor.weebly.com/uploads/1/3/3/9/133998007/lovitutamabijob-duduv-punorovazofeze-tokupo.pdfIn PDF document text
    • https://dowawanezezezo.weebly.com/uploads/1/3/1/0/131070762/kukujitigopuju.pdfIn PDF document text
    • https://dimavuvinidet.weebly.com/uploads/1/3/1/3/131397938/8d71cd5492ccf.pdfIn PDF document text
    • https://doxuxipineza.weebly.com/uploads/1/3/0/7/130740192/e10d4e2c8015685.pdfIn PDF document text
    • http://djami.ru/402187066118xy93.pdfIn PDF document text
    • https://cdn.sqhk.co/wofazexej/QYibdcA/69506172972.pdfIn PDF document text
    • https://cdn.sqhk.co/wikaraxixi/upAUSij/arkham_horror_card_game_investigators_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lagadasisipas.rf.gd/2301714167.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/doduxi.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_off0000f839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF839 5520 bytes
SHA-256: 367d104b829ebd23eaa57111f2748a52345c026f9fb9ce3391063791d1cd78b5
font_01_sfnt_off00010aed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AED 11116 bytes
SHA-256: 5d9093d4f15fd58220f4618ba4c2ecddf14b32d20ff0ab3dcb8745d7b0aa1535

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