Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6192bfa0b0249dd…

MALICIOUS

PDF

74.7 KB Created: 2021-05-30 01:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4d0c79eee1c24fef9af664d22541306d SHA-1: a98556d8130e0321cb218f01d3b63a8ad894c323 SHA-256: e6192bfa0b0249dd4bb5871c95991cb5bcd6c9cbc1a173aeed3ef1bc24bb7f04
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm. It contains numerous external links pointing to disposable domains, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of a URL with a 'utm_term' parameter indicates a potential phishing or SEO-spamming campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • 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://fokemale.ru/strik?utm_term=money+cheat+for+gta+san+andreas+ps2 PDF link annotation
    • https://vekeliludodim.weebly.com/uploads/1/3/4/7/134745250/a564f6c.pdfIn PDF document text
    • https://pekafulif.weebly.com/uploads/1/3/1/4/131437409/kevutoxitogu-jupatifabu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444875/normal_5fdd61ab27711.pdfIn PDF document text
    • https://zijubanefim.weebly.com/uploads/1/3/4/3/134349059/kukatabi.pdfIn PDF document text
    • https://dutudofedibajun.weebly.com/uploads/1/3/2/8/132815365/madufuwanuraxer-mezapujasagogem-funokazobalog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489028/normal_606e029b49fcd.pdfIn PDF document text
    • https://xarupome.weebly.com/uploads/1/3/4/4/134469096/8b625e99ecc51c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495385/normal_6023fca27e10a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392207/normal_5fe6b685f1b52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472221/normal_6063d18fc1c38.pdfIn PDF document text
    • https://guwidavimup.weebly.com/uploads/1/3/4/8/134893931/zarunuw_dokag_rejezudosavew_renenavolozem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408588/normal_5fd916e6d6fcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495973/normal_60640e0914275.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_604eb88f64bf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426942/normal_5fd97bc105a6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369499/normal_5ff7730f1ae04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459630/normal_606114d417021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371808/normal_60356101ae8dd.pdfIn PDF document text
    • https://rerararomimin.weebly.com/uploads/1/3/1/3/131383042/1189694.pdfIn PDF document text
    • https://pafudufuwod.weebly.com/uploads/1/3/4/3/134326080/fejibavigirivi.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/228f9dc9-2fc3-4839-bb7d-15a8563f7d16/wunipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ce39345-5525-4094-957b-f47cc1874fc2/how_much_do_army_reservists_get_paid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cbc6c87-7332-4a1e-b3e1-a4cc393974c7/cuanto_es_1_80_pies_en_pulgadas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9d55b4-ba0f-434d-91f9-664910030c31/managerial_economics_and_business_strategy_8th_edition_chapter_5_solutions.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_off0000e543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE543 5624 bytes
SHA-256: cd0fbb9972843bddc6a92f7bc5d4147d2ea9510087a3cf0d0290122d6dbea106
font_01_sfnt_off0000f885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF885 10868 bytes
SHA-256: 99e15900a5495f83e2ecbdfc3e2a7c163e880034deb536c303f2e49f843e643f