Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb50008ae64e8ea…

MALICIOUS

PDF

68.0 KB Created: 2020-12-31 14:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 3a2fd592f33a24e686a4d12e978a9b62 SHA-1: ee6d7a4fbbe2f6662b3b23d6dd4c825891487473 SHA-256: bfb50008ae64e8ea57038672da006a79357dfad498529b4d87dbed7af8ef401b
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 potentially malicious domains, indicative of a link farm or phishing lure. ClamAV and ML classifiers strongly indicate maliciousness, specifically flagging it as a phishing trojan. The presence of embedded URLs and the PDF structure suggest an attempt to redirect users to malicious sites, likely for further payload delivery or credential harvesting.

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://traffset.ru/strik?utm_term=rolly+hill+game PDF link annotation
    • https://cdn.sqhk.co/bowewulaxam/thf3Ujj/78135217238.pdfIn PDF document text
    • https://cdn.sqhk.co/ludozenidi/JEghieD/mimogubogizigav.pdfIn PDF document text
    • https://cdn.sqhk.co/naforokafe/e6jejcP/68904666906.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464330/normal_5fdaa8a85d35f.pdfIn PDF document text
    • https://lomofoxagut.weebly.com/uploads/1/3/4/5/134524577/zobekogovebuzan_livixujakawese.pdfIn PDF document text
    • https://cdn.sqhk.co/tidelefuzin/LjfG82a/defense_battle_mod_apk_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/linigurep/dhbFghG/fanawodubipanegefazuxajom.pdfIn PDF document text
    • https://fiduwovizeget.weebly.com/uploads/1/3/4/5/134517619/miwewup.pdfIn PDF document text
    • https://cdn.sqhk.co/masunidupag/Nplhagg/57619444288.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabure/NEhdb3W/little_alchemy_game_walkthrough.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/gopuze/xurosofazijosatipebuke.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/12721901027.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/angular_ui_bootstrap_modal_form_example.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_off0000c30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC30A 3400 bytes
SHA-256: 28d6f16a1a278fef58f2ea20e66758dd2e0550abe6ec77fce2cc0f1e7e4f02b7
font_01_sfnt_off0000cf02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF02 4936 bytes
SHA-256: e516188edcd6133f2ffbba48f8a94e9dc6ceacca0498667cf211d8c484eaafc8
font_02_sfnt_off0000dfb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB6 10424 bytes
SHA-256: 83587c37b09608d990d8a21f19a7da46fcd20a348c9dc8cd30a4e6771fa3252a

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