Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6b2c23331a80aa…

MALICIOUS

PDF

74.9 KB Created: 2020-11-11 18:09:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0581343a2c96f0a0395b86f486e0faa4 SHA-1: 114d9d6fa4ab5f39af566f6a525a202092e77e0f SHA-256: 0a6b2c23331a80aa1a7a2f89d19b322949f059c3f0f26464526d0678efa988dc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs and a heuristic firing for a "PDF_SEO_LINK_FARM", indicating it is designed to redirect users to external websites. The primary URL, 'https://traffnew.ru/aws?utm_term=canada+bcg+vaccine+guidelines', suggests a phishing or scam attempt by impersonating relevant search results. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to drive traffic to malicious or deceptive content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/aws?utm_term=canada+bcg+vaccine+guidelines PDF link annotation
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/xalodatapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404980/normal_5f950bb47fc41.pdfIn PDF document text
    • https://lokugejepotag.weebly.com/uploads/1/3/4/3/134318746/kuvelizudurufivubije.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/5341355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f871ceb8d4ce.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/jajoxulabojaso/6257899284.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/yellowfang_and_fireheart.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/algebra_1_puzzles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d75af03d-af41-4978-a03c-bbedf54d94e0/karubakanufopuzozabus.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/65486365342.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/the_lemonade_crime_summary.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_off0000ea0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0E 5116 bytes
SHA-256: da92ec15950ed20dc5b80c8dc82f7cba3986fecb0962908485ea1bfe644ae975
font_01_sfnt_off0000fb86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB86 10432 bytes
SHA-256: ece78e72f4f547e201a54a21a2c289f8b743a21578a3000ff061e14e935d3ded

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