Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5fe8abef8de7aff…

MALICIOUS

PDF

76.2 KB Created: 2021-04-02 17:07:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2a79ae7d024507859c9402e1d751265d SHA-1: 1911ac3d6566a55058eb23f6532eb88736a7cd79 SHA-256: f5fe8abef8de7afff4cadbc1928886af9c375824f1a10e5344dbb00e451eec09
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded content, though heavily obfuscated, likely serves to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/wix?keyword=rosario+ala+sangre+de+cristo+original PDF link annotation
    • https://mesubepivugegej.weebly.com/uploads/1/3/2/6/132682347/daladepep-gozelapujesufas-betoxova-selapenijigiju.pdfIn PDF document text
    • https://marutonekuposew.weebly.com/uploads/1/3/1/6/131606360/bazizefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480149/normal_6019a51f54a72.pdfIn PDF document text
    • https://fosuwelu.weebly.com/uploads/1/3/2/6/132695698/3b4e50eaa66601a.pdfIn PDF document text
    • https://wenutezow.weebly.com/uploads/1/3/5/4/135400756/759323.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/24553006437.pdfIn PDF document text
    • http://nituzovido.getenjoyment.net/zezetubikadovesew.pdfIn PDF document text
    • http://zefujixa.mywebcommunity.org/lolakupezoweturegibif.pdfIn PDF document text
    • http://xegazinijitup.mywebcommunity.org/x_files_bad_blood_explained.pdfIn PDF document text
    • http://borejukeluteva.mygamesonline.org/auxiliary_verbs_exercise.pdfIn PDF document text
    • http://nateribebomulaz.medianewsonline.com/tigoponelavuritulujivosem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485579/normal_5fdc9996435c9.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/3e2a8fe8-0783-4d46-bf5f-4fef644d0052/jimekupinodumudazuti.pdfIn PDF document text
    • http://miwewugewu.atwebpages.com/skylar_grey_fifty_shades_of_grey_song_lyrics.pdfIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_baed712e6b384e8fabce2e5fa9f33ee2.pdf?index=trueIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/rojotanulasavudaliruke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b48b2dc2-6e30-415e-af1d-af26a3000bde/how_to_fix_ariston_water_heater.pdfIn PDF document text
    • http://gufopexolax.myartsonline.com/gijakuforemisodezesutu.pdfIn PDF document text
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_96475c823a3644a9948cdb8ae380a1a3.pdf?index=trueIn PDF document text
    • https://a16eeaf1-ab09-4fb7-bdbc-3ebfa24c279d.filesusr.com/ugd/03042f_6c8d65c8329542f79bc42fce84b0e87a.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_off0000eaa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA2 5112 bytes
SHA-256: 469251534f92d9915d5de05d2e04d9e0f3f745577b751b406742bd73003423ca
font_01_sfnt_off0000fc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC19 11804 bytes
SHA-256: af995b7993090a767268e089b11af93153772bc032e71963a44d8107d070fb7a