Malicious PDF — malware analysis report

Static analysis result for SHA-256 317d2f01165394fc…

MALICIOUS

PDF

93.8 KB Created: 2021-03-28 10:18:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b42804fc3777cc0714ce17f7bf377d4d SHA-1: e950d9594654d361d1036a330c179f371af1fca8 SHA-256: 317d2f01165394fcf2313eeae153049eed9d5d74c25725a65337b03e04c42b16
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a link farm, and is detected as malicious by ClamAV and an ML classifier. The primary URL, 'https://gimoguvi.ru/award?keyword=factores+psicologicos+de+la+sexualidad+pdf', suggests a lure related to psychological factors of sexuality, likely to drive traffic to SEO-optimized content or phishing sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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/award?keyword=factores+psicologicos+de+la+sexualidad+pdf PDF link annotation
    • https://repugololenip.weebly.com/uploads/1/3/4/8/134880500/a03ac68.pdfIn PDF document text
    • https://tawigijonepoter.weebly.com/uploads/1/3/4/0/134012415/5738f6.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/ifjj2ic/high_sound_tone_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/ghjbha0/jitizomodowikizurusim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459162/normal_5fff6661e4f05.pdfIn PDF document text
    • https://polavimiwusirew.weebly.com/uploads/1/3/2/6/132681763/zodepomizutis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374177/normal_5ffa501a3209d.pdfIn PDF document text
    • https://cdn.sqhk.co/todipageb/eigRUhh/96311527929.pdfIn PDF document text
    • https://waxosutuj.weebly.com/uploads/1/3/1/4/131437699/golanijut-venip-fomilunukiw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464314/normal_5ff61617bfa04.pdfIn PDF document text
    • https://tawisowa.weebly.com/uploads/1/3/5/3/135315305/segawejivokotu.pdfIn PDF document text
    • https://buzomuzugagi.weebly.com/uploads/1/3/4/3/134313884/f07d3da215b.pdfIn PDF document text
    • https://guvusogom.weebly.com/uploads/1/3/5/3/135324715/12639.pdfIn PDF document text
    • https://xepozumer.weebly.com/uploads/1/3/1/3/131380160/danasusirit_jememix_lorof_weriz.pdfIn PDF document text
    • https://xopigitit.weebly.com/uploads/1/3/4/3/134339451/lagerimudanewugukib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462694/normal_5feb7231062ce.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvuxemoguf/hG9N8jb/destiny_2_shadowkeep_lunar_battlegrounds_ghost.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5405d108-7f1e-482b-a10c-e06f62b7505d.filesusr.com/ugd/d941b1_8fc9c53a6f8b4657b9b72e6448b80259.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fupanabivote/buvedotewigofivewo.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/salesforce_adm_201_certification_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/libam.pdfIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_2d588d2b5df04497be56ac8e572174e1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/zipotikobizojadab.pdfIn PDF document text
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_f09a3a65627d40769deb15bbabf9e381.pdf?index=trueIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_34cde5744ffd4cd2b62229709522eea4.pdf?index=trueIn 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_off00012c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1B 5348 bytes
SHA-256: a36bbd6d7543e3a7be478e61279fe06c6552c923c839da24e0dfdfe6760d1ff0
font_01_sfnt_off00013e62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E62 12784 bytes
SHA-256: 4353f45bf0bbefa88cbf8798c9333aaebe759dc2328bf669db0092db694588e8

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