Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2fcbdc2877b961f…

MALICIOUS

PDF

77.3 KB Created: 2021-02-12 01:02:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: acf1996cc9cd9c3f06440645de252f57 SHA-1: 5cd63de0c5c35a4c90436990e2dd32340fa1cada SHA-256: e2fcbdc2877b961f0adabdeec66046fd5051de3e055316d128bcf29762033c2d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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://bologen.ru/wix?keyword=descargar+juegos+apk+%252B+datos+sd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387565/normal_6023d24b574d3.pdfIn PDF document text
    • http://ruzazeruduzelu.22web.org/mudagizu.pdfIn PDF document text
    • http://all-system7.xyz/el_sufismo0itj5.pdfIn PDF document text
    • http://salea.site/31161364183rlek0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450415/normal_6018cdc60e082.pdfIn PDF document text
    • https://nelovemisero.weebly.com/uploads/1/3/4/3/134347795/9183849.pdfIn PDF document text
    • http://hdvideo.design/71314067977po7ki.pdfIn PDF document text
    • http://sobakin.space/85830632408akppp.pdfIn PDF document text
    • http://bionatur.space/7499304208v5epf.pdfIn PDF document text
    • https://birupilanakok.weebly.com/uploads/1/3/4/0/134017156/radin_bezuwobajuwof.pdfIn PDF document text
    • http://reduslimitaly-official.website/stickman_football_soccer_3d_mod_apkk2hgf.pdfIn PDF document text
    • http://ukranews.icu/meteor_garden_soundtrack_free8oiv7.pdfIn PDF document text
    • https://zoxaminajoge.weebly.com/uploads/1/3/1/6/131637873/a190ecd52f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450732/normal_6005f974129a1.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/divexikav/63613846846.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/agile_business_analyst_performance_goals.pdfIn PDF document text
    • http://wulagaw.rf.gd/collformic_matagalls_les_agudes.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/eyewitness_rocks_and_minerals_video_worksheet_answers.pdfIn PDF document text
    • http://wobemiko.epizy.com/kuvepud.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_off0000e2ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BA 5348 bytes
SHA-256: f493c9f1d55f547093010b8a8cfc72086f137ec062a8a75907395a66b701fee9
font_01_sfnt_off0000f50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50A 16300 bytes
SHA-256: e37e9f746a1c2571d12ac9ce359588269e4eb5e54d29a270094158f7b57ea248