Malicious PDF — malware analysis report

Static analysis result for SHA-256 f11cc4d4f5a6cc51…

MALICIOUS

PDF

67.9 KB Created: 2021-03-18 22:48:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 3ce230c753acc4f7760ab4b049ccac4d SHA-1: 8900f9149af3800decd9a5c4b4220733573c1447 SHA-256: f11cc4d4f5a6cc51f1c5e17283f72fc223e15713a2872d9bd218f9ee9a634f95
184 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are hosted on disposable domains, suggesting a link farm designed to attract users with search terms like 'free download'. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7936

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://jottigo.ru/award?keyword=free+download+bhagavad+gita+english+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393485/normal_6023f7b635a59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5fd1e5724e520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418777/normal_602c1a497189d.pdfIn PDF document text
    • http://bukuxojunuz.mypressonline.com/haber_process.pdfIn PDF document text
    • http://kexawez.mygamesonline.org/7139929321.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ee7ef41-9972-4963-9a4d-fcb62d117272/digitech_rp55v-00_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c43a9507-1e32-48fe-8cd1-2bed39117904/47587107962.pdfIn PDF document text
    • https://d62ff7d9-aefc-4ab8-8cdf-af38868aea16.filesusr.com/ugd/54b9a1_f6eb643db8c94af4b2282ce1bb552299.pdf?index=trueIn PDF document text
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_75df3c8d032348ab88f6b14eb720691b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/26729b59-4ed0-404c-abb5-e01a6e0e3ba0/wewegefugufidonixaluwuku.pdfIn PDF document text
    • https://f85e9a30-dbb9-40fd-a66d-53bd7daafe07.filesusr.com/ugd/1b9faa_8d4c39577f1d4c0c96b801ce665b4f31.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b43b0eda-3d83-4bdf-ac92-380f121fe71d/xegewesavuvesulubolivu.pdfIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_c2f8dc05d29a42af8a675e981e76af93.pdf?index=trueIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_a222a2dd40d24c168b30e86426b6c0c2.pdf?index=trueIn PDF document text
    • https://1ceef7f3-d523-4f80-a0a4-3aed54d3d17a.filesusr.com/ugd/48841a_87ec4601a67b4174b9b66600fd85b84c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c2e27b8-0daa-41c3-a057-add5c22d5061/australian_rainbow_fish_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42239cd1-2569-4566-bd59-ae29136e69e8/9014984289.pdfIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_eca15cc96f9c481485453c8268b4206c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5a85d3a-f2c0-4eb4-bc7a-a1b2eaec267c/91112124174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cc36291-4f5f-4cf5-9178-36a3b0e0cbea/73726851227.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/507fe4c3-16b7-4fe0-99f1-1b244f0bac17/the_secret_book_in_hindi_summary.pdfIn PDF document text
    • https://37976aa0-f55f-47d3-847a-8d185b13ebf6.filesusr.com/ugd/1d6212_7074a574fed54475866b2013250c83f8.pdf?index=trueIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F5 5552 bytes
SHA-256: fc8f487af70173da2decff09f53e79a6491edacb568b794b83314cd36c4080b6

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