Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fc7d9d0d83f536e…

MALICIOUS

PDF

79.1 KB Created: 2021-01-05 13:22:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2aa424e02d2f547e534c9f50442f4d5f SHA-1: 7eb598a46e9aa897edc9e3c062619a41a7b38c9c SHA-256: 5fc7d9d0d83f536e1b7f223d92bfcf0363f443a6a2cefbc57d07dca2a221073c
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly flagged this PDF as malicious. The document body, though partially corrupted, suggests a lure related to a 'Lucas oil transmission fix manual' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/123?utm_term=lucas+oil+transmission+fix+manual In PDF document text
    • https://cdn.sqhk.co/powirafawume/ibgffHQ/wolfy_s_restaurant_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/wodigajamu/EgiEjbC/super_retro_16_full_version_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369777/normal_5fdc887a9ae16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401711/normal_5fb41facbbba3.pdfIn PDF document text
    • https://cdn.sqhk.co/xadowififux/Whhgihe/carrera_rc_mario_kart_how_to_charge.pdfIn PDF document text
    • https://cdn.sqhk.co/negixakozaxu/bqggifM/firegifuzikivonaxowiluf.pdfIn PDF document text
    • https://cdn.sqhk.co/dufukeraj/icwLzUz/junikawifojovut.pdfIn PDF document text
    • https://cdn.sqhk.co/jepipovi/iakghFV/panoxasujidi.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/potofaw/can_you_connect_apple_airpods_with_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e21f611-9543-447f-9773-3afa52572a8e/wukozejazafubagavimaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f53b7498-7685-409d-bfa3-d218810322b4/legally_blonde_musical_script.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/99426446851.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/building_skills_for_the_toefl_ibt__2nd_edition.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_off0000f920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF920 5036 bytes
SHA-256: ed96647326627ee5fd71d403fadc822c57e0d00a65088a77c5b07fec60200eb2
font_01_sfnt_off00010a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A34 10968 bytes
SHA-256: 90b7c07854110a70ec5b5f6a8aa910ef51edcdc1937c5874638a7c687c3f5782

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