Malicious PDF — malware analysis report

Static analysis result for SHA-256 555e5c04044cc5b1…

MALICIOUS

PDF

74.0 KB Created: 2021-03-02 15:37:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 32ec921bd3e1c15ef686a5abe14c2780 SHA-1: df58ce5a3616a140d16a4daadaeed6dacbd652a7 SHA-256: 555e5c04044cc5b1f8e2d7553079b92ec156fa18c622eaf5e868085cfc96c812
156 Risk Score

Malware Insights

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

The PDF document contains a significant number of external links, identified as a link farm, with the primary URL pointing to a suspicious domain. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external links suggest an attempt to redirect users to potentially harmful content.

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://vilenefex.ru/award?keyword=how+to+eat+fried+worms+chapters PDF link annotation
    • http://just-gopro.com/rezajizub8ii97.pdfIn PDF document text
    • http://fishing-rods2.club/zokuzosewopibugukuko8b0uo.pdfIn PDF document text
    • https://robidolaw.weebly.com/uploads/1/3/0/7/130776002/xakofan-wisowisavisana-xovumogog.pdfIn PDF document text
    • http://damvglaz1.xyz/how_do_you_conduct_a_workplace_investigation98dzl.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/iey64iA/60612400212.pdfIn PDF document text
    • https://nogigeto.weebly.com/uploads/1/3/4/6/134665346/mozapu_jorekixid.pdfIn PDF document text
    • https://finedogu.weebly.com/uploads/1/3/4/7/134749629/1724500.pdfIn PDF document text
    • http://glasshookahcatering.com/rubik_s_cube_3x3_guide3mki8.pdfIn PDF document text
    • https://kejobogufepemis.weebly.com/uploads/1/3/0/7/130775396/kirapugekena_nogupanokese.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/tofizo/35720402275.pdfIn PDF document text
    • https://s3.amazonaws.com/dabatisew/chevy_equinox_2013_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/23448632061.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/bootstrap_templates_for_news_site.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/lejijesuboju.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_off0000e469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE469 5416 bytes
SHA-256: 676f864387cb79c26de1ba70ed9648ee60fb9dba1ee9f6953576ae7bc2ebfe99
font_01_sfnt_off0000f6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C4 10748 bytes
SHA-256: 39ef465942ba4b7b98fc6bc788b6783c9f6fcf01a7a28d38558cc842821e7227

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