Malicious PDF — malware analysis report

Static analysis result for SHA-256 051e1099edd7510c…

MALICIOUS

PDF

72.6 KB Created: 2021-06-05 06:47:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f21658004e1bccc1e5ee9e75aa7a7ec SHA-1: 9fc94a974341b726c2313a6ea796c300e9b477a8 SHA-256: 051e1099edd7510c00654660760c0d0b769bc35915130520b01b2c0b59cffdb8
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm or phishing lure, as indicated by multiple heuristics flagging it as a 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM'. The document contains numerous external links, including one to 'https://crysiq.ru/pbw?utm_term=tangram+figuras+para+ni%25C3%25B1os', suggesting an attempt to redirect users to potentially malicious or deceptive websites. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=tangram+figuras+para+ni%25C3%25B1os
    • https://kuxiwapanipajof.weebly.com/uploads/1/3/0/9/130969705/eab082.pdf
    • https://cdn-cms.f-static.net/uploads/4411001/normal_600b4016e7dd5.pdf
    • https://zerevodajerut.weebly.com/uploads/1/3/4/5/134502997/vagoxabujelodu.pdf
    • https://nusomosuguxapo.weebly.com/uploads/1/3/4/6/134693055/gazedapotemuzox.pdf
    • https://cdn-cms.f-static.net/uploads/4459483/normal_602a1581186ab.pdf
    • https://rixolojujosu.weebly.com/uploads/1/3/4/6/134622111/nezuborevubi-metomig-berogevisivan-ninopisu.pdf
    • https://kogatakuzomaw.weebly.com/uploads/1/3/4/4/134444425/a7713bca129c97a.pdf
    • https://lomewulepizava.weebly.com/uploads/1/3/3/9/133999744/jividutaj.pdf
    • https://jipukikibowema.weebly.com/uploads/1/3/4/6/134633032/popubafur-zikezujawodapu-lejarodaza.pdf
    • https://static.s123-cdn-static-d.com/uploads/4424696/normal_60b2253a1706e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wexagiz.pbworks.com/w/file/fetch/144640587/how_to_use_dvr_on_dish.pdf
    • http://pimepovume.pbworks.com/w/file/fetch/144559218/cuando_se_podra_viajar_entre_provincias_en_aragon.pdf
    • http://runaliguredu.pbworks.com/f/65301237828.pdf
    • https://uploads.strikinglycdn.com/files/f9bfd7e3-814f-40c4-bf99-e676e5bff3df/microsoft_access_2010_tutorial_for_beginners.pdf
    • http://fuxedemama.pbworks.com/f/omlet_arcade_mod_apk_revdl.pdf
    • http://nigezid.pbworks.com/f/sweat_price_kayla.pdf
    • https://uploads.strikinglycdn.com/files/8be27e2c-0359-4aff-8d49-cd1a7a34d88d/11201592324.pdf
    • https://uploads.strikinglycdn.com/files/188f5be7-9f29-427c-9758-3b6333a81be2/3921715618.pdf
    • http://jozeluwofe.pbworks.com/f/download_minecraft_java_edition_apk_1.15.pdf
    • https://uploads.strikinglycdn.com/files/00915987-718c-4688-b5a2-2187606eb413/zenoto.pdf
    • http://redejok.pbworks.com/w/file/fetch/144562428/90453389420.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_off0000db4a.bin
03d88a74f1ad695c6dcd8a825e47922c1fbefb333caa5ae60f6e6937e4c3bb88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4A 5352 bytes
font_01_sfnt_off0000ed2e.bin
5257ccf5cb35b687037bb481bddc3189f9ecb4de86d5de365b996f441887f095		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED2E 11760 bytes

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