Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba39602234df8d4…

MALICIOUS

PDF

74.9 KB Created: 2021-03-28 06:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: abd8c6e187780506708a518888efc1ad SHA-1: 47a4089205b7c38a2e5a1d53e071e3dcac3e1305 SHA-256: aba39602234df8d443831a3a3fcf0c1ca3c7422e7886efd8d07f7e74f47f43a8
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/strik?utm_term=peavey+vypyr+vip+2+40w+review PDF link annotation
    • https://paluwewokob.weebly.com/uploads/1/3/2/7/132712057/rolaf-wovedawo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414501/normal_60364938f40c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371003/normal_5fd16f6016331.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386335/normal_60020e5ee258f.pdfIn PDF document text
    • https://bosudire.weebly.com/uploads/1/3/4/4/134456289/lumoze.pdfIn PDF document text
    • https://bexusisase.weebly.com/uploads/1/3/4/5/134596812/a9b37659.pdfIn PDF document text
    • https://mexejafulid.weebly.com/uploads/1/3/4/8/134880369/rutinojavorelosos.pdfIn PDF document text
    • https://femesavez.weebly.com/uploads/1/3/1/3/131383434/nufavedizuwifiziten.pdfIn PDF document text
    • https://runidodejifam.weebly.com/uploads/1/3/4/0/134040950/b1656cc705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452389/normal_6019cf6d7be97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452587/normal_5fcb381fbd553.pdfIn PDF document text
    • https://gatojodegapov.weebly.com/uploads/1/3/1/6/131637656/cced8c.pdfIn PDF document text
    • https://betisifi.weebly.com/uploads/1/3/1/4/131438474/popipajafiju-kasegewodati.pdfIn PDF document text
    • https://zabodoxukuxubar.weebly.com/uploads/1/3/4/9/134904472/sapimarajes.pdfIn PDF document text
    • https://sejerujezoxovod.weebly.com/uploads/1/3/1/3/131398555/128012.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485450/normal_602aa7d8017ef.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/d64d5a438fae3.pdfIn PDF document text
    • https://kikezisukoka.weebly.com/uploads/1/3/5/4/135400991/2570077.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404953/normal_5ffe2a0c7ee90.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muvarelo/asp.net_mvc_core_3.1_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/selivuvumepaveb/what_hotel_was_used_for_the_interior_of_the_shining.pdfIn PDF document text
    • https://s3.amazonaws.com/penale/flow_chart_latex_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/can_can_spartito_pianoforte.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_off0000e82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82D 5220 bytes
SHA-256: c25e741aec3543368bc355952652010ac44e14a68976c3642cf7c133e5654d14
font_01_sfnt_off0000fa1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1F 10680 bytes
SHA-256: bac377a268db9acf9a2cb8e4c73e1cffc92a9ff126a9f6556c0c8922f4943571