Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a20b026dc93edd6…

MALICIOUS

PDF

73.5 KB Created: 2021-05-12 05:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 69b6c9ec2bc2b3cfa786aca6316a4bb3 SHA-1: 96123fdc6ace4d608c199084906d9432dfa515c0 SHA-256: 2a20b026dc93edd6dc424920bd85157ee089fcd23d72507407587201914ee72c
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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
  • 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://zajinet.ru/strik?utm_term=how+to+export+data+from+trimble+tsc3 PDF link annotation
    • http://wordwild-store.com/percent_of_1_rep_max_for_strengtho8lym.pdfIn PDF document text
    • http://pasetbs.xyz/swtor_patch_not_working6t9xz.pdfIn PDF document text
    • http://bonboxstudio.com/label_design_templates_online4iynr.pdfIn PDF document text
    • http://pixilapusir.22web.org/xiwejujemodidubiritov.pdfIn PDF document text
    • http://fuxofexafot.iblogger.org/muzukesavixen.pdfIn PDF document text
    • http://zedukibawubige.22web.org/87289907968.pdfIn PDF document text
    • http://bigtittybella.com/zesizunebonozokejejigphsv7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a24bc4ef-4ee2-4fae-af0c-c9fea810b245.filesusr.com/ugd/67d96c_8b1ecccf9e904e9e9cabd64427c14d1f.pdf?index=trueIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_a0abad480b254e28bbe1b8fabba405fb.pdf?index=trueIn PDF document text
    • https://11ab4cf5-156d-4417-99e9-5039b2a7eb5f.filesusr.com/ugd/82d61e_1fa285fbd8514f6db15175da55b4fa52.pdf?index=trueIn PDF document text
    • https://3315be42-5dab-4b6e-b44d-105cb490973e.filesusr.com/ugd/2e3488_aa44de887d8943beaa424da44310a40a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/19075016-b8a0-4bd6-8847-0a8cf70418a5/dunkin_donuts_matcha_latte_nutrition.pdfIn PDF document text
    • http://rajimorix.rf.gd/8367929374.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef8e0caf-4f29-49a5-b20e-559da12caa99/fanirukemibibudamadaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afc59ecf-b278-4503-862a-c5331ea95d5c/58189847117.pdfIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_61f29f42a5094345bb2454396b9e0d96.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/373cc11b-8ae9-4136-9d5a-bd79b243a102/62637981879.pdfIn PDF document text
    • http://fogalefudomuj.epizy.com/wapap.pdfIn PDF document text
    • http://gadojir.rf.gd/92505055340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce81dad8-351b-4940-ad46-a6a53eeeb220/79182019678.pdfIn PDF document text
    • http://zulexesovo.epizy.com/fipuguzotenagabe.pdfIn PDF document text
    • https://5e9c932d-19a8-4d5a-a970-d4bc0bcb832b.filesusr.com/ugd/bae0a0_1daa761bb211460390c1aa91bd774495.pdf?index=trueIn PDF document text
    • http://lipidojomodu.rf.gd/small_butchery_business_plan.pdfIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_c8b150f9e86144bba5f3c0fb874796ae.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FC 4084 bytes
SHA-256: 07c588056e3bc9ef87323829229ace5185a1863f263b2d9ded54fdfcda37c085
font_01_sfnt_off0000e17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17E 5724 bytes
SHA-256: 3e66c2b3e297da2118637262fd4a7822f7dd27c0f398b484ad1a28e2e6036b03
font_02_sfnt_off0000f4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F8 10252 bytes
SHA-256: a1865c393d2632acb01d6899c5ce91968d4df8f384cd4779cf0660824a6ee306

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