Malicious PDF — malware analysis report

Static analysis result for SHA-256 b677f9b846f38ebe…

MALICIOUS

PDF

80.7 KB Created: 2021-03-24 04:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b5add1c723e0d91486c1ab13a78a0290 SHA-1: e94011a01e6fb5d75511bb36ce2e600f888d55bc SHA-256: b677f9b846f38ebea2e9bc6d2ba59c978ba86b8f1487dd06337d8e3532f767c4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 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://soxebez.ru/award?keyword=protein+in+foods+chart+pdf PDF link annotation
    • https://teregurejojexol.weebly.com/uploads/1/3/4/8/134879353/vavezaxazorig.pdfIn PDF document text
    • https://cdn.sqhk.co/koxixoneto/jrgghiF/dukimimaxizetodupawe.pdfIn PDF document text
    • https://jimilosebot.weebly.com/uploads/1/3/4/0/134096588/f445234dedef02.pdfIn PDF document text
    • https://gumijaxedug.weebly.com/uploads/1/3/4/5/134529094/goxolasukibu_lamuwamoga_kejadovarizen.pdfIn PDF document text
    • https://finowizefi.weebly.com/uploads/1/3/1/3/131383614/9931223.pdfIn PDF document text
    • https://cdn.sqhk.co/rigizisojix/iGge2hh/vatagimisokuxuwulonupen.pdfIn PDF document text
    • https://cdn.sqhk.co/gusisitixinu/hhfwGgj/groovepad_music_and_beat_maker_mod_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipufo/iauHhgg/jirodala.pdfIn PDF document text
    • https://cdn.sqhk.co/pilimisoduk/chj8Wji/27931957634.pdfIn PDF document text
    • http://sandiego-podcasts.com/96066857297tkbu3.pdfIn PDF document text
    • https://kuvobawodamelis.weebly.com/uploads/1/3/5/3/135350379/05eeba7379.pdfIn PDF document text
    • https://cdn.sqhk.co/semejegofip/zhhyghO/terejudugomamepuxi.pdfIn PDF document text
    • https://cdn.sqhk.co/sizozizaj/0gcmjcX/84950361262.pdfIn PDF document text
    • https://cdn.sqhk.co/rowunozimop/igSgeji/garmin_dash_cam_mini_review.pdfIn PDF document text
    • https://kitawusew.weebly.com/uploads/1/3/4/2/134234725/26d64989eaeac.pdfIn PDF document text
    • https://jukorupojos.weebly.com/uploads/1/3/5/3/135344641/porefirosiv-gibakosu-jevamewubagez.pdfIn PDF document text
    • http://storeyou.store/agro_ecological_zones_of_malawie5kie.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c4862ec1-a0f7-4497-b0b9-ae99e84b3fd9/81299447583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd2f754-e5b9-4f28-babd-d97a59d71c72/how_to_set_up_voicemail_on_consumer_cellular_flip_phone.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDD 5000 bytes
SHA-256: 365fc3291446e086761d8204630f33eba3e713babc8a8bdbbf84a224b29122b5
font_01_sfnt_off000100ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CE 11108 bytes
SHA-256: b4619dd21b0536e0a9e57981e3af757b4f91ce9c66c0c9dad5ddd7384a5db74b
font_02_sfnt_off00012652.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12652 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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