Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19c40630f256417…

MALICIOUS

PDF

75.0 KB Created: 2021-01-10 01:18:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 873b3ce5dbd636694f85a5c0fa1d1855 SHA-1: ef0614e716d0c91631cfa3f388d37eb2784f94ac SHA-256: f19c40630f2564178f2e3e1fc6db590437e3ce5a6938f515bd6628ab0a003446
214 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous external PDFs, with one URL identified as a malicious redirector. The document's content, though obfuscated, appears to be a lure related to 'Gnostic books of the bible pdf'. The presence of a malicious redirector and the link farm structure strongly suggest an attempt to lead users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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/aws?utm_term=gnostic+books+of+the+bible+pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4367019/normal_5ff8ab759eca0.pdfIn PDF document text
    • https://tagaxaxe.weebly.com/uploads/1/3/5/3/135390661/620500.pdfIn PDF document text
    • https://site-1178444.mozfiles.com/files/1178444/sotabopelolikiluzuwa.pdfIn PDF document text
    • https://site-1171574.mozfiles.com/files/1171574/real_piano_teacher_app_download.pdfIn PDF document text
    • https://bisaderivulele.weebly.com/uploads/1/3/4/7/134744485/9337311.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/povodijirig/gimefemuwonu.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/my_whatsapp_status_online.pdfIn PDF document text
    • https://s3.amazonaws.com/kokesatodixon/texas_boater_education_exam_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/21954912000.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/nesadoguvufe.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_off0000ea92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA92 5172 bytes
SHA-256: e1cc25d6ea15baccd7d8af0e445430fb0d2a8c9d6e89fbd7ab6003183a1b5be3
font_01_sfnt_off0000fc30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC30 10772 bytes
SHA-256: 5c5eb5ea138fbac0aca1de28e56c012d32cb69f264d11d27d1f4664604e958c7

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