Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ead2581d350c987…

MALICIOUS

PDF

80.9 KB Created: 2021-02-25 00:19:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a6281e4ae1b937a9b4ad8b12d54311e9 SHA-1: 12f7a766912d3e6d19f34b83604675acb174ab45 SHA-256: 0ead2581d350c987037c60fce585f65959ac28cd01141f1824d7a4382a8bb9c4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs with numeric slugs, indicative of a link farm or SEO spam tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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.
  • 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://baarspo.ru/123?utm_term=canon+pixma+mg6320+review PDF link annotation
    • https://cdn.sqhk.co/pipujevi/ejek8gf/44106285793.pdfIn PDF document text
    • https://nagipunewemog.weebly.com/uploads/1/3/5/3/135315215/musalamotukadumojeb.pdfIn PDF document text
    • https://sunatoruxule.weebly.com/uploads/1/3/4/4/134476105/kozad-ridede-zewipajepix.pdfIn PDF document text
    • https://xinemituvirow.weebly.com/uploads/1/3/4/1/134108685/498387.pdfIn PDF document text
    • http://it50life.pro/jenezapowivoboxu457e.pdfIn PDF document text
    • https://gorejirulikem.weebly.com/uploads/1/3/4/7/134738880/8d37297ee9f.pdfIn PDF document text
    • https://kunobozawi.weebly.com/uploads/1/3/1/4/131453145/vetituluzoda-vubul.pdfIn PDF document text
    • https://cdn.sqhk.co/makafabakuna/jhTggic/buzilipoluwozafawurisugo.pdfIn PDF document text
    • https://viwoxewadekam.weebly.com/uploads/1/3/4/0/134016770/9509502.pdfIn PDF document text
    • https://zuduloto.weebly.com/uploads/1/3/4/6/134623707/nasolun.pdfIn PDF document text
    • https://tidekomix.weebly.com/uploads/1/3/4/4/134441433/turonalafujanefunar.pdfIn PDF document text
    • https://luzenesezenobo.weebly.com/uploads/1/3/5/3/135307250/95d647ed3830b8.pdfIn PDF document text
    • https://pirulavedup.weebly.com/uploads/1/3/1/3/131379447/d75ac5.pdfIn PDF document text
    • https://nuridofif.weebly.com/uploads/1/3/4/2/134234753/vuvogekuvuruje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/wsba_mcle_reporting.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/medela_manual_breast_pump_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/3_year_old_math_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/car_racing_game_apk_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/game_basara_4_for_pc.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_off0000fe3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3C 5644 bytes
SHA-256: 0c2e8fc8385ce5601f667a0ab7163d04f4eecee35cc3f2f3eb43a4831fec62d2
font_01_sfnt_off0001117c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117C 10728 bytes
SHA-256: e2bb76131c6ee341d6e70daec16b89f77422bd4af5aedc27a0439ab893641dbc

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