Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc22cc8178b9425…

MALICIOUS

PDF

71.2 KB Created: 2020-12-23 11:48:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8f6eff0af115cdf3bd22f9712ddcec99 SHA-1: d1617a357fe6245d0f10226e48d405de5197e05a SHA-256: 2fc22cc8178b9425e004559c1cf54516c49df3077fc87d0c89bd8b1bd19f693b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying it as a 'PDF_SEO_LINK_FARM'. The presence of a malicious ML classification and ClamAV detection further supports its malicious nature. While no scripts were directly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to potentially malicious content or phishing sites.

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
  • 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://traffset.ru/strik?utm_term=starship+troopers+battle+music PDF link annotation
    • https://tejitopojod.weebly.com/uploads/1/3/4/7/134737109/liwaganidujoton-rusuzalido-witovawuluxaj-jakixiwuresog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391009/normal_5fcac19b41471.pdfIn PDF document text
    • https://jimagofer.weebly.com/uploads/1/3/0/8/130813953/katuram.pdfIn PDF document text
    • https://lalusaguru.weebly.com/uploads/1/3/4/6/134611329/lomojixalemepuzopugi.pdfIn PDF document text
    • https://bubiwodepu.weebly.com/uploads/1/3/2/8/132815961/giguviladomimis-sazisoles-xadarok-zezorevaxoz.pdfIn PDF document text
    • https://milavigik.weebly.com/uploads/1/3/2/8/132815866/1478910.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/fizaxo/cloudformation_reference_s3_bucket_name.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/noponunitire.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/badlands_south_dakota_map.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/38945346923.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/activated_carbon_thesis.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfdd38a3bf4b14aba341ea/t/5fc0d6dbfa04221c713f6485/1606473436857/87491055212.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/super_toss_the_turtle_hacked_apk.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_off0000d9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9C6 5416 bytes
SHA-256: 2aeb8c031b5515e30009e300f535902d5bc95e4b0d27a36d49d6ebfbc8fc80eb
font_01_sfnt_off0000ec00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC00 10624 bytes
SHA-256: 47f49fba3b47538f893df17e49d6ad956327833a578e36724bec7368eef64c53

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