Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8274179c14e3eb1…

MALICIOUS

PDF

74.8 KB Created: 2021-05-28 05:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3766adb48903962a0d817665adb6e83e SHA-1: e916a337a2abfce044f988722944dea62e79250b SHA-256: c8274179c14e3eb122caea035594ad206c97707f0d996a8b5f86e500c668b8b8
194 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing lure, employing a link farm strategy to direct users to external websites. The presence of numerous links, many hosted on disposable domains, and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate malicious intent. The document's content, though heavily obfuscated, appears to be a lure for downloading content, likely leading to further malware or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/strik?utm_term=bride+of+chucky+movie+free+download PDF link annotation
    • https://guromofir.weebly.com/uploads/1/3/4/4/134489627/kutotetugukafe.pdfIn PDF document text
    • https://mazegiwekode.weebly.com/uploads/1/3/4/5/134529082/4ad8f2affd2aa63.pdfIn PDF document text
    • https://dukezowe.weebly.com/uploads/1/3/4/6/134602160/futuzanadawi-wopuminijove.pdfIn PDF document text
    • https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/kowef.pdfIn PDF document text
    • https://bajiwemijowulu.weebly.com/uploads/1/3/5/9/135990815/nebene.pdfIn PDF document text
    • https://poxotedodesogin.weebly.com/uploads/1/3/4/3/134305686/185129.pdfIn PDF document text
    • https://zadumujiz.weebly.com/uploads/1/3/4/6/134626950/fugitajiloka-wenojoruzazini-xolubuxe.pdfIn PDF document text
    • https://guvoruba.weebly.com/uploads/1/3/4/7/134742814/6fc01.pdfIn PDF document text
    • https://dosabaret.weebly.com/uploads/1/3/4/8/134861273/8743853.pdfIn PDF document text
    • https://tenanetudoji.weebly.com/uploads/1/3/4/2/134266315/7d622153346d99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485434/normal_601a47a21001c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498376/normal_5fe22f5e1334f.pdfIn PDF document text
    • https://menelaxewo.weebly.com/uploads/1/3/4/3/134362368/vedetaw_sudag_topodakanas_bufoziroxabuj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487413/normal_6066af02e31be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366407/normal_6060fed18cb7e.pdfIn PDF document text
    • https://xusofudubivo.weebly.com/uploads/1/3/0/7/130775679/letezomaji.pdfIn PDF document text
    • https://kokodukitibov.weebly.com/uploads/1/3/4/6/134609001/pejidabiti.pdfIn PDF document text
    • https://gifivetusox.weebly.com/uploads/1/3/4/7/134736849/711f2e.pdfIn PDF document text
    • https://kesafukiwunutab.weebly.com/uploads/1/3/4/9/134900694/49453.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/7d45dd3c-39d9-4512-a482-9bcc720c4877/84906062175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bdb2223-bd42-4831-9d5b-75c8342fc652/what_does_toc_mean_in_the_military.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_off0000e77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE77D 5452 bytes
SHA-256: 6e2b75b68e8fc5cba93ed5f2bc8c1c34766e209a971571133a9ad5a94c37f132
font_01_sfnt_off0000f9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F9 10528 bytes
SHA-256: 594b5943039fb1a05f41b6d57a9092a44e6f0f45e9ff2f0bb1d89cec37757e80