Malicious PDF — malware analysis report

Static analysis result for SHA-256 676266247c7d3a59…

MALICIOUS

PDF

75.1 KB Created: 2021-03-10 20:10:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be86add6d4be6760a408b916df335eab SHA-1: 9c8e54067988d612165079f3ebe26d4845bcf250 SHA-256: 676266247c7d3a595e6c05da0770536e8129e845b6c640657169bf86fe3036fe
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful sites, possibly for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/aws?utm_term=first+6+cube+numbers+answers
    • https://cdn-cms.f-static.net/uploads/4469827/normal_601e706aca42f.pdf
    • https://furureseseruwa.weebly.com/uploads/1/3/4/4/134481841/maxowepobig.pdf
    • http://yarrebitteh.online/66139229497d4hwg.pdf
    • https://cdn-cms.f-static.net/uploads/4401519/normal_603eb6a9c55f2.pdf
    • https://bamewubi.weebly.com/uploads/1/3/2/3/132303354/dikoxibujerigix.pdf
    • http://copyright-rules-help.com/tactical_submission_ada_maria_sotolw4h5.pdf
    • https://dukagalirizaz.weebly.com/uploads/1/3/1/8/131856141/sofizitotarotizuji.pdf
    • http://all-system7.work/wulazegigozeboguwkgz9q.pdf
    • https://cdn-cms.f-static.net/uploads/4415527/normal_603618aaf30b8.pdf
    • https://xofudafitigo.weebly.com/uploads/1/3/5/3/135327781/bakofekojesu.pdf
    • https://cdn-cms.f-static.net/uploads/4403822/normal_5fd11cc3219ee.pdf
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5feb72ab6483f.pdf
    • http://jizerigozigalav.getenjoyment.net/badger_100_garbage_disposal_reset.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/34daaec6-31d3-4150-9552-ea1f39011803/77653130875.pdf
    • https://uploads.strikinglycdn.com/files/41095a5f-4d42-48f5-902a-3826f1ae1fe7/how_to_apply_gentle_leader_collar.pdf
    • https://uploads.strikinglycdn.com/files/edd6f1f7-65bb-4e1b-b0d7-b131d29651ed/bikini_body_guide_2.0_free_download.pdf
    • https://uploads.strikinglycdn.com/files/fb3130e1-e63c-4157-99f4-eb921368bdee/why_is_my_transmission_not_engaging.pdf
    • http://vesedakowata.onlinewebshop.net/casio_g_shock_ga_1000_strap.pdf
    • https://uploads.strikinglycdn.com/files/8f3a0e29-ba13-4f67-9563-5517f11f5ba2/79904911316.pdf
    • https://uploads.strikinglycdn.com/files/89322cdf-7cda-4cf7-850e-fd6f8af9044f/vishnu_sahasranama_malayalam.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e81d.bin
95e207c55a2ce6ee71016d40a4653164fbec0bb482fb002dd6a827461970bef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE81D 5256 bytes
font_01_sfnt_off0000f9fa.bin
dd754f894fca4bbd7751fa4b572c4b095f16140690ae44c9d37f60297ab3346e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FA 11020 bytes

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