Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e12578237c4407c…

MALICIOUS

PDF

71.8 KB Created: 2021-06-11 14:16:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ceeab237fc00a29091e722c14cf60e83 SHA-1: 04232bcfb8828589e7c7e527c00ca8c527fa2c22 SHA-256: 8e12578237c4407c99179a580ee272812af7636fa2056044a2f1d39981ab314c
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a link farm with numerous external PDF links, including one pointing to 'infrive.ru' which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be a lure related to movie downloads, suggesting a phishing or social engineering attack.

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://infrive.ru/pbw?utm_term=kung+fu+panda+full+movie+in+telugu+movierulz PDF link annotation
    • https://kijagixizob.weebly.com/uploads/1/3/3/9/133997709/wumedawesimani.pdfIn PDF document text
    • https://mivuwapirodi.weebly.com/uploads/1/3/2/6/132681474/a9c8f68037.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/663a55fb-db48-4013-8bbd-dcee85d3e303/intermec_pm4i_user_manual.pdfIn PDF document text
    • http://nafidob.pbworks.com/w/file/fetch/144613575/55086032262.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b596a498-ade7-432a-b475-47da927b325e/duzakemomekozanuref.pdfIn PDF document text
    • http://zilebunod.pbworks.com/f/vugejubige.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/082c9f3f-f6fa-4900-b970-f07c1e10b926/89081300124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93afcb90-9912-4faf-ab3e-71d54f00f0d7/75936349668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeb4aa55-771f-4821-9561-ecf995f2c397/ontario_boater_exam_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d40224c5-dd6f-4ee5-80f2-b722fb9e074f/9214210781.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2e88f1d-d075-4a90-91ee-c0e4aa2de1d6/jump_force_ps4_new_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f349e10e-9a96-47bd-8b05-2ff83af15941/30022087225.pdfIn PDF document text
    • http://vazexetuv.pbworks.com/f/what_do_animals_in_dreams_mean.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/w/file/fetch/144455952/why_is_my_polaroid_speaker_not_working.pdfIn PDF document text
    • http://pobonagul.pbworks.com/f/triple_yahtzee_score_sheets_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d8354ef-5002-4f1f-b00a-99a7149b960a/completing_the_square_equation_khan_academy.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_off0000d86a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86A 5264 bytes
SHA-256: 97f9d767d0e42744af27f5272d16a12399c997733524098dee9d737ec20bc79b
font_01_sfnt_off0000ea57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA57 11036 bytes
SHA-256: 722d1b692b7131cad772cd937d1a875144afc5c7fafe8413a7f75d1899f555b0

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