Malicious PDF — malware analysis report

Static analysis result for SHA-256 8285aeb2d288fba6…

MALICIOUS

PDF

72.1 KB Created: 2020-12-17 09:07:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 492514f8eb1469dddbda26cffd9e3181 SHA-1: 16da9abde0f9c0f183eb8a70da32032daff36678 SHA-256: 8285aeb2d288fba6311962d8ba51cea833c665671069809381f9288a55f508dc
216 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is a PDF document that impersonates eBay to lure users into clicking a link that redirects to a malicious PDF. Heuristics indicate a brand-impersonation credential phishing attempt and a link farm, suggesting the primary goal is to steal user credentials. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely involving exploitation or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/xetowomalidupok-xinexumero.pdf.
  • 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://trafftec.ru/123?utm_term=bamboo+back+scratcher+ebay PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488090/normal_5fd9307d95a9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_5fbc6719ecbb0.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/xetowomalidupok-xinexumero.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee1be18c5c478ec05fff/1606282780338/komubimatujawawajagen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7f8a489-d3e3-45a7-830d-559f79a68201/lotro_crafting_guild_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c6758139af0376668248/t/5fd66d6aab77727176909b8a/1607888234805/carer_s_leave_statutory_declaration_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0187aa5bc066edfa15e28/t/5fc1d4092dd96f5918321d33/1606538250079/ds1054z_programming_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d934edd-9c8b-4297-83ef-57d114621058/troop_committee_challenge_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d26b89e-df57-46eb-b3af-3276c10770ed/dewalt_dw718_blades.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc54b94084698658e7b646c/t/5fc63fcffa04221c71f49c76/1606827985532/bounce_back_loan_natwest_feeder_account.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/695ecceb-49a7-41ae-87d5-a44c028f40f7/combat_mission_barbarossa_to_berlin_scenarios.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d1b73398ff751546ef88/t/5fccd8af9aa2de0c64925993/1607260351373/72413656835.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_off0000dd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6D 5360 bytes
SHA-256: 597937748e836a2742f9e2598a89acfc6531767e05541c3c678788b7d0666430
font_01_sfnt_off0000ef87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF87 10704 bytes
SHA-256: eee69e7c1049d2423fe377a927120dab03a442be6f1851b5e51bd1c4d84d48b1

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