Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f947f3b24e22b66…

MALICIOUS

PDF

47.9 KB Created: 2020-10-16 05:34:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 231e6066deb0bd1a72521fbcdb04d5ff SHA-1: a60314adcaab29612499280b8e5d36998e96bab6 SHA-256: 3f947f3b24e22b66e5add1c4f4893b3798a1438d06fad03ed429b1799da6ef80
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, suggests a lure related to 'general power of attorney form pdf uk'. The presence of a link farm and a critical redirector firing strongly indicates a phishing or malicious redirection attempt. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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.
  • 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://ggtraff.ru/123?keyword=general+power+of+attorney+form+pdf+uk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f88ffe88e446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f87522b38550.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5f88b8b051e07.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0793/4103/files/boliduvesubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9480/2589/files/bakofutajemulazaduradon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3494/3389/files/42205132069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6845/7113/files/lewawufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/719ddbed-306f-49cc-8daa-3bb14502dfb7/bukidupigolas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d03d6a-355a-4487-a2c9-acf4966e4352/68319828394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d00f7eca-42c0-46ba-aa17-383e2d4a7a6c/jexupofefamanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db6f5b67-1c22-4779-9025-448403c42597/darare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/658e9cd8-e96b-40c4-8252-6f840ce27db0/peritilo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfaa24a9-220a-4f40-93ee-1f659670126c/siruzazuxazamobim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab05da56-f3da-466c-a217-39ef23160d45/pisiwuvura.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d03df3-fd8b-4b94-a681-640f2acb81cb/fowexilu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88941b48-2d35-486f-a4c8-62c7005d4a19/59629127244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2991/2488/files/senior_high_school_physics_curriculum_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7967/3032/files/animal_shelter_volunteer_orientation_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0105/2836/files/vijir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1028/4456/files/4293657699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2157/6610/files/swtor_gunslinger_6.0.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_off00007f1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F1B 5300 bytes
SHA-256: ea766e173f452d39fd623dc96a0bc0b685e9133cba21ef83800262389c785563
font_01_sfnt_off0000912a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x912A 9560 bytes
SHA-256: b29efb978e894dca60d6e4d023ad5c6dd1c9cf22b992b708f38305a50aa94a68

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