Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d1dd6003fd4062…

MALICIOUS

PDF

66.9 KB Created: 2021-05-20 20:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c3d1be71261bd81669c99a5c311c9289 SHA-1: 8f6f338f907be289cd5e74be54e4ce45fd860fd0 SHA-256: d3d1dd6003fd4062ce0cd9773cefd1afd69c468363cf07c970a4ee2f2b018bee
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8402

Heuristics 4

  • 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 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://baarspo.ru/strik?utm_term=simbolos+del+tablero+del+carro PDF link annotation
    • https://velaliwud.weebly.com/uploads/1/3/4/6/134644949/9399647.pdfIn PDF document text
    • https://dosisusibifoba.weebly.com/uploads/1/3/4/2/134236234/pigevolev.pdfIn PDF document text
    • https://kogewovedof.weebly.com/uploads/1/3/4/3/134339257/pefetewadomemobawi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478137/normal_6068de57e4e8f.pdfIn PDF document text
    • https://sotokogel.weebly.com/uploads/1/3/4/2/134266154/9595255.pdfIn PDF document text
    • https://lasakewozazewa.weebly.com/uploads/1/3/1/4/131437605/dezokub_sisurazipajulip.pdfIn PDF document text
    • https://kepegefamoza.weebly.com/uploads/1/3/1/3/131398453/molena_dakurowabizej_zovowiregu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366637/normal_5ffae3fe9e988.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/e957057e-81e9-4687-8525-519e5484c4d1/miller_suitcase_xtreme_12vs_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/dipejikozifo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8387284-7b6a-4fe9-a244-b0e1316ac1d2/wahl_hair_clippers_cleaning_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2916c1aa-12c2-423f-a647-3f6538f7e42b/51578767614.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/231cb2e1-9771-4f61-aff1-22344a5ed9f0/viwowuzabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e6dec8e-2c29-4744-8a70-650ec5f8f214/ulysses_poem_character_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7d05d0a-515a-4f46-bb92-993b6ee119d3/givubun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10179c66-2ac1-42dd-9980-d5ef98a302e6/97020019460.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/61818076391.pdfIn 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_off0000e244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE244 5328 bytes
SHA-256: b8f656fd03a159f188bc41711865a3e76210a8cea2aee6e4f958968adc14a10e

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