Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4b2ded141365bb…

MALICIOUS

PDF

93.6 KB Created: 2021-02-20 19:12:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6059918d131cf45d3cf28a00a0c6782b SHA-1: b9e9e38962eeced3da9a08fae2b3e6874c634c2b SHA-256: 6d4b2ded141365bb56aebad02d450b7e63c9f9cd3d3a6d6cf1ee9ede60e78b98
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many pointing to domains commonly used for hosting malicious content or for SEO link farming. The ML classifier and ClamAV detections strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful websites.

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 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://bologen.ru/wix?keyword=wonder+student+packet+answers PDF link annotation
    • https://cdn.sqhk.co/munuluxel/ob5mQic/fruit_carving_hd_pics.pdfIn PDF document text
    • https://cdn.sqhk.co/mukutosi/geBiigf/day_r_premium_cheats_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/jovHLig/kovovedufodemagobidox.pdfIn PDF document text
    • https://jinumajot.weebly.com/uploads/1/3/1/4/131409926/181a6885a1.pdfIn PDF document text
    • https://cdn.sqhk.co/zivuzigup/2OigqVY/fujuwodirifefagitezesut.pdfIn PDF document text
    • https://cdn.sqhk.co/modurasisuwu/7gWjiig/tivatisapefasaxod.pdfIn PDF document text
    • https://cdn.sqhk.co/kogoruzojif/hjagjii/war_dragons_forum_breeding.pdfIn PDF document text
    • https://cdn.sqhk.co/supesuvepo/DxIxTie/transfer_sim_card_to_new_phone_att.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422890/normal_5fcd244553b25.pdfIn PDF document text
    • https://cdn.sqhk.co/bafuberudod/egehAaW/sesifotoniwatowe.pdfIn PDF document text
    • https://cdn.sqhk.co/gefewivurov/gcdQidI/tulivusalugawofefemovare.pdfIn PDF document text
    • https://wiperorapaxomun.weebly.com/uploads/1/3/5/3/135323561/554069.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493610/normal_6016a5d6155fa.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/kihHGhj/bedusus.pdfIn PDF document text
    • https://cdn.sqhk.co/xovikojux/5hfjijb/50110667373.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477376/normal_5feef234a2992.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/kumasala/analisis_literario_de_el_almohadon_de_plumas_de_horacio_quiroga.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/93568808508.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_off000130f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130F9 5204 bytes
SHA-256: d37316afb9a5095595745e787641a683c81271195c690364234cdbc9ea6d6d38
font_01_sfnt_off000142d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142D9 11288 bytes
SHA-256: d0d35f030da843985c7fbc74c9c2982ffc831114e6b1826cca5d93ab46a92a2d

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