Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed1d2efa67dab129…

MALICIOUS

PDF

75.5 KB Created: 2021-06-04 06:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47829a7e123acbddaa3972ece1ad6b10 SHA-1: 7afedb163744214bda40178423f771b2f22faa56 SHA-256: ed1d2efa67dab129c575ef56bcb2aca948796db111616ded0667d94c0daf2388
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous external URLs that likely lead to further malicious content or phishing sites. The presence of multiple external links, some with UTM parameters, suggests an attempt to manipulate search engine results or distribute malware through a network of linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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 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://crysiq.ru/pbw?utm_term=re+verbs+french+present+tense
    • https://cdn-cms.f-static.net/uploads/4494165/normal_6027623512e9c.pdf
    • https://cdn-cms.f-static.net/uploads/4426551/normal_5fda56ab6bb2a.pdf
    • https://mudodikakagiluz.weebly.com/uploads/1/3/4/5/134598929/gavixadojarij.pdf
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/muzutazupevokoloneb.pdf
    • https://juwarojolajekol.weebly.com/uploads/1/3/4/1/134108785/9518558.pdf
    • https://mavuweginu.weebly.com/uploads/1/3/2/6/132681431/7b3ac5.pdf
    • https://liburesaxus.weebly.com/uploads/1/3/4/3/134372769/rufewifotun_bamemina_zutunojo_vovabatuzod.pdf
    • https://kuvakikarubefi.weebly.com/uploads/1/3/1/3/131383404/lazozisitapin.pdf
    • https://zeduxuvanoripi.weebly.com/uploads/1/3/0/7/130775880/470825.pdf
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/murevesata.pdf
    • https://tekujutiwud.weebly.com/uploads/1/3/4/2/134234893/gotudemob_sebodunojo_zujobapifetumul_dulopezazu.pdf
    • https://tebelusagunesaz.weebly.com/uploads/1/3/4/3/134318259/32618f2688db.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://duziruromeja.pbworks.com/f/how_old_is_kirito_and_asuna_in_alicization.pdf
    • https://uploads.strikinglycdn.com/files/b4f099d1-0a8e-4137-a09e-c13fefa09d91/2005_chevy_tahoe_service_manual.pdf
    • http://pefumugat.pbworks.com/f/zidibaxakobowinowezixado.pdf
    • http://polubisoxuwo.pbworks.com/f/tanezixerovevuwisukuxele.pdf
    • https://uploads.strikinglycdn.com/files/aa3dfc11-4dbe-411e-a76b-e2d909879d28/vipedefarapame.pdf
    • http://bekivuxuga.pbworks.com/f/closers_survival_guide_ebook.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9fd.bin
f94acf090b09d51eb8a763aaf239d6c0a368c8c94617f101e7d9fcdd2d57ae34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FD 5068 bytes
font_01_sfnt_off0000fb47.bin
f8c1213a8014da0283ad1c682a1af6960ff6c56f8187e728e0c35097a1156f7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB47 11244 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.