Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d10cc71d7028a4…

MALICIOUS

PDF

83.6 KB Created: 2021-05-28 05:43:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0a87704a67fb60d89352d6553eb6fcae SHA-1: ddd34d41297c336d7487b5fdb865904f3caca078 SHA-256: 60d10cc71d7028a42a79ac5c84f5562a96b3ff936b198d993244b6fde2227132
226 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. It uses a password-protected-archive lure. 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 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://gimoguvi.ru/strik?utm_term=psp+fight+night+round+3+save+data PDF link annotation
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/zesukukuw.pdfIn PDF document text
    • https://nofodomeki.weebly.com/uploads/1/3/1/8/131871852/1832035.pdfIn PDF document text
    • https://fuzaterolipi.weebly.com/uploads/1/3/1/4/131438829/054fea5f63e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419437/normal_600de189e129c.pdfIn PDF document text
    • https://kenomipijisax.weebly.com/uploads/1/3/3/9/133986884/furaxefob.pdfIn PDF document text
    • https://jobubati.weebly.com/uploads/1/3/1/4/131453688/xomojo-ragag-dukuwitowozosir.pdfIn PDF document text
    • https://nugekowu.weebly.com/uploads/1/3/4/5/134587082/9506712.pdfIn PDF document text
    • https://padotugaladod.weebly.com/uploads/1/3/4/6/134615244/ed4da90b.pdfIn PDF document text
    • https://zexiditituluw.weebly.com/uploads/1/3/4/7/134734655/b226ae6abb93b4.pdfIn PDF document text
    • https://nijeliwawinezim.weebly.com/uploads/1/3/4/4/134497061/d19edb.pdfIn PDF document text
    • https://kilosite.weebly.com/uploads/1/3/0/7/130739696/435f08790.pdfIn PDF document text
    • https://lonopenofof.weebly.com/uploads/1/3/4/8/134895818/dazasipudelibawew.pdfIn PDF document text
    • https://xugofuli.weebly.com/uploads/1/3/1/0/131070332/7502257.pdfIn PDF document text
    • https://rotuvose.weebly.com/uploads/1/3/4/8/134849004/887683.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_6069e49242d1d.pdfIn PDF document text
    • https://sekawoxovezu.weebly.com/uploads/1/3/4/0/134018239/kalusejamujidabide.pdfIn PDF document text
    • https://lobusejorul.weebly.com/uploads/1/3/5/3/135338183/7503484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_604719038baa6.pdfIn PDF document text
    • https://kogavegi.weebly.com/uploads/1/3/4/8/134873631/rifuseg-lupedo-somazezazofore-memul.pdfIn PDF document text
    • https://kozedisibep.weebly.com/uploads/1/3/4/8/134898116/4690929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480170/normal_605a009a27967.pdfIn PDF document text
    • https://pasobirumolok.weebly.com/uploads/1/3/5/3/135394389/zalig_lajolumasat_wutuvuwizifak_jatazogare.pdfIn PDF document text
    • https://vimadefivikimaw.weebly.com/uploads/1/3/4/2/134265378/43fbcc3d.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/adb64011-656c-41a4-ba0a-c649e101a7c3/cuando_se_puede_detectar_embarazo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb76e53a-efc9-422d-bcd5-b2adb74fb961/tiluni.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_off000108b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B3 5496 bytes
SHA-256: 28019efc56cbfd883ec2d70f435cacb0ac6ce9e38a2895c4645de71b948aa232
font_01_sfnt_off00011b6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B6B 10872 bytes
SHA-256: 20d7d36eb49f782960cbefa0a445f179658740137cc11b23bbe0c2623781660d