Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e60baf0da865657…

MALICIOUS

PDF

89.4 KB Created: 2021-05-31 05:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 560810ae43e64839fa0fc190c3063c28 SHA-1: 8839be0c1fc31994e988d1030e29f59cbaa1bbbc SHA-256: 5e60baf0da8656579458f9fe9bdd6ab9b6f4dd0e6ab440c7d2acd4a02ba5fe5d
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 0.9989

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://jumiwimov.ru/strik?utm_term=bl2+how+to+beat+haderax+the+invincible PDF link annotation
    • https://nanopimage.weebly.com/uploads/1/3/1/3/131398258/2102176.pdfIn PDF document text
    • https://modemogip.weebly.com/uploads/1/3/0/7/130776314/f3c41066c31.pdfIn PDF document text
    • https://pijutizomi.weebly.com/uploads/1/3/4/6/134686964/wupitij-roxaro.pdfIn PDF document text
    • https://nozirokopen.weebly.com/uploads/1/3/4/6/134613575/5874108.pdfIn PDF document text
    • https://zunijitulizi.weebly.com/uploads/1/3/5/3/135305500/rafigejime.pdfIn PDF document text
    • https://gitujibexilen.weebly.com/uploads/1/3/1/4/131406430/5d4b69d.pdfIn PDF document text
    • https://nalepigetor.weebly.com/uploads/1/3/0/9/130968958/894367.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369185/normal_5ff191ebb85d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488806/normal_605a0f566bb51.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4485696/normal_60b04b6721897.pdfIn PDF document text
    • https://golamusexa.weebly.com/uploads/1/3/1/6/131606818/kemavil.pdfIn PDF document text
    • https://sewajevujunu.weebly.com/uploads/1/3/2/8/132814136/a195c6898307.pdfIn PDF document text
    • https://lepenenaxagonu.weebly.com/uploads/1/3/0/7/130739126/lutixolomavogi.pdfIn PDF document text
    • https://joxobupapi.weebly.com/uploads/1/3/1/4/131454586/f2dae992c2c39.pdfIn PDF document text
    • https://dawikuwavuvuka.weebly.com/uploads/1/3/4/8/134866752/f76ecd98088a4c.pdfIn PDF document text
    • https://jotozorofelafik.weebly.com/uploads/1/3/1/4/131405965/winugogimawibe.pdfIn PDF document text
    • https://wosiwimobej.weebly.com/uploads/1/3/1/1/131164223/1835827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390069/normal_5fede95518804.pdfIn PDF document text
    • https://faromemexe.weebly.com/uploads/1/3/5/3/135399009/5759909.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/81618dfc-f822-45cc-8b83-604a65f7c774/91172786530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c28a7f10-3278-4d29-be59-20c46ec3df9a/94018650361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57dcd14f-12f6-48ab-ba95-6c678db17520/vuxizuku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c98c6ef-f588-4cd3-b744-967cba45aac3/60081199682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c50bd82-1430-4a39-b587-47ca2beabc12/21798269114.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001138c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138C 5176 bytes
SHA-256: e1c0149ecd818a2887aabecd79afc846e70e61c2de0e4d7f62a42003a46eff3f
font_01_sfnt_off00012531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12531 10784 bytes
SHA-256: c84cc66924a3166f55c5add7568418ade8fe8c3e0fd8f22117e74ada5acd7262
font_02_sfnt_off00014a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A08 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3