Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9ece3f0e5eb5263…

MALICIOUS

PDF

23.2 KB Created: 2020-10-13 07:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e3e2f4a720d9bbf4febca700eab913b8 SHA-1: bcc4eb5f1dce9c8caef7ad47f611d2127f5cd5ea SHA-256: f9ece3f0e5eb526316dcdf2c08b273cbe47042cdc1b9d77fb7cb1ca26d327148
122 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. One URL is specifically identified as a known malicious redirector, suggesting the document is designed to lead users to malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 3

  • 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 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.
  • 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://ggtraff.ru/strik?keyword=igbt+working+principle+pdf In PDF document text
    • http://files.fouledbore.com/uploads/1/3/0/7/130738714/gogikadulekejipute.pdfIn PDF document text
    • http://files.desireesinger.com/uploads/1/3/1/8/131857695/7677384.pdfIn PDF document text
    • http://files.perockss.com/uploads/1/3/1/4/131438563/fevejomozufor_tosogolikugulap_pavibose_lisifexiz.pdfIn PDF document text
    • http://files.ohbmbrainmappingblog.com/uploads/1/3/1/6/131637896/3f800.pdfIn PDF document text
    • http://gukigetim.uteachdallaspbi.com/uploads/1/3/2/7/132740580/8853294.pdfIn PDF document text
    • https://site-1042442.mozfiles.com/files/1042442/kovimidamitidotipirutu.pdfIn PDF document text
    • https://site-1039270.mozfiles.com/files/1039270/33327948799.pdfIn PDF document text
    • https://site-1038455.mozfiles.com/files/1038455/durasapemajux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba466a6-a9b2-42bb-b9a3-1c5f9030b3f2/31456520568.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ac82dd-ba6e-44b1-92b5-06372c5c96be/27569331831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a65638ae-4f78-4bd3-a04d-d5012936dca0/sixazakirosidalotuxepiro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a14fb1bf-3fbc-485b-988b-48d560c59e59/78309947918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4839/8759/files/vabozewopomagezijerobirim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/dragonball_dokkan_battle_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0929/7560/files/nakerifugiwizobijebino.pdfIn PDF document text

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