Malicious PDF — malware analysis report

Static analysis result for SHA-256 92112a1ac3e0fae0…

MALICIOUS

PDF

80.9 KB Created: 2021-05-23 08:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 26b1397252f602887d1ebdb4c54034a8 SHA-1: 5f38ff3c56d2baf774b9c0727bc6b6ca9eaf4897 SHA-256: 92112a1ac3e0fae03ad10bf28b82477f86447b889951c407c4d0635173efdc3b
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing operation. The embedded content, though heavily obfuscated, appears to be a lure related to movie downloads, which is a common tactic for distributing malware or leading users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=ardaas+karaan+full+movie+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427509/normal_605891ad39aee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_6033145788a85.pdfIn PDF document text
    • https://zajoxewamabovi.weebly.com/uploads/1/3/7/5/137503144/dagip-rujizudilem-suxanusebu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_60405f672c593.pdfIn PDF document text
    • https://wibotutez.weebly.com/uploads/1/3/4/0/134012840/dumidipu-kexovan-silamuxelo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451932/normal_60418c5c4a027.pdfIn PDF document text
    • https://xafarigokexugu.weebly.com/uploads/1/3/6/0/136053206/joderawa.pdfIn PDF document text
    • https://gubizotalu.weebly.com/uploads/1/3/1/8/131871644/1996304.pdfIn PDF document text
    • https://lidovoji.weebly.com/uploads/1/3/4/3/134313359/7422771.pdfIn PDF document text
    • https://rogubofiduga.weebly.com/uploads/1/3/1/0/131069879/5083337.pdfIn PDF document text
    • https://babulavired.weebly.com/uploads/1/3/0/7/130775389/1895aacc45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417214/normal_605c19e8cba43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_6015223d7d411.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475565/normal_60065b50d9aa6.pdfIn PDF document text
    • https://zabodoxukuxubar.weebly.com/uploads/1/3/4/9/134904472/82c91169.pdfIn PDF document text
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/4833875.pdfIn PDF document text
    • https://widadujas.weebly.com/uploads/1/3/1/1/131163760/mopubavofixeru_rutitu_tunemolelijiro.pdfIn PDF document text
    • https://sudefenumub.weebly.com/uploads/1/3/5/9/135984534/cdc74f22fdb.pdfIn PDF document text
    • https://futilupotozuvat.weebly.com/uploads/1/3/1/4/131454482/napaje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500904/normal_5fcaa90c9d6a5.pdfIn PDF document text
    • https://roxasunuveju.weebly.com/uploads/1/3/1/4/131437516/1406149.pdfIn PDF document text
    • https://losuwigawoje.weebly.com/uploads/1/3/5/3/135304717/nugugobovagof-semev.pdfIn PDF document text
    • https://gixinizolovuz.weebly.com/uploads/1/3/5/3/135348456/vijofo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57F 5164 bytes
SHA-256: 192ae3d88ea3cb5103557d8ceac00c9f5297792ddfcceccf9e6e873ac6df09c9
font_01_sfnt_off0000f706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF706 12216 bytes
SHA-256: 67f69b15735d1ef3f1163280295c87202377bd4c30999428c70a7cda1530da1b
font_02_sfnt_off00011fc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC3 16356 bytes
SHA-256: 9a127b977f8d71a1f27c0882c767003a3435febbd578006c567eb70299c2528a