Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4e4bc3eec8ff3f2…

MALICIOUS

PDF

71.1 KB Created: 2020-12-18 06:29:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1b17bcf1db576851c3dbc175b2b6fe7f SHA-1: 27c66b460f22ed26a247b8c9868da7d95c4a0e64 SHA-256: e4e4bc3eec8ff3f24f3536f4ff9a0b670b6042a930d660587ee8079f295e9611
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or redirection mechanism. One prominent URL, 'https://trafffe.ru/strik?utm_term=showbox+apk+watch+free+movies', indicates a lure related to free movie downloads, a common tactic for distributing malware or conducting phishing. The heuristic 'SE_URGENCY_LURE' also suggests the document may employ urgency tactics to prompt user interaction.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffe.ru/strik?utm_term=showbox+apk+watch+free+movies PDF link annotation
    • https://gazesomudari.weebly.com/uploads/1/3/1/0/131070071/ae298717cd82.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/8999412.pdfIn PDF document text
    • https://tujozidu.weebly.com/uploads/1/3/4/6/134694944/vijabubepevolurozesa.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/2b329a187.pdfIn PDF document text
    • https://tunupufimudodo.weebly.com/uploads/1/3/4/3/134324073/9276265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366362/normal_5f8736d0307b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426080/normal_5fa0ae4212fc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451757/normal_5fa7f9280b0ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483365/normal_5fa8de73b0675.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/viwoxuz/ohio_alternate_assessment_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/85999135623.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/vasudowo.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/bretton_woods_system.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/android_fragment_listview_adapter_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/051d137c-41ac-48f6-ba49-91986e6b6327/telepati_yoluyla_ak_edenler.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/67576331866.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/nebedafumubav.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_off0000d744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD744 5748 bytes
SHA-256: adc8f7979357e5a71e7ceafb3816ffbd935615f5efcdd79b20c716609767f5ad
font_01_sfnt_off0000eacb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACB 10604 bytes
SHA-256: d48f2416332c76541364c15259ddb7daa4e9b7d7d7680f5b1978dcca917ca14e

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