Malicious PDF — malware analysis report

Static analysis result for SHA-256 fea270caf35e2e13…

MALICIOUS

PDF

71.7 KB Created: 2021-02-02 02:10:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: d1eb1cfed346461480b2bc8f775c9d8a SHA-1: 83b64aee098570ed76fac6b9e6368d15c571c1d9 SHA-256: fea270caf35e2e13f4f21405d6267c02047bdcca805a8e726943701ae31a98f0
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure for commercial support guidelines, likely leading to malicious content or phishing pages.

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://bologen.ru/aws?utm_term=accme+guidelines+for+commercial+support PDF link annotation
    • http://bandalet.club/biwekugatam8csf.pdfIn PDF document text
    • https://gadufekovofu.weebly.com/uploads/1/3/4/7/134764592/pawozobetobekavene.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/jdCignV/xanujuvedelebowuxifatan.pdfIn PDF document text
    • https://bomoturu.weebly.com/uploads/1/3/1/3/131384468/042ba4a128e0.pdfIn PDF document text
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/2388238.pdfIn PDF document text
    • http://successinyourlif.website/art_ball_3dexb5c.pdfIn PDF document text
    • https://zijobukevas.weebly.com/uploads/1/3/1/4/131454580/vugesikefezetud-nonitefaxo-vexijetoleg-zegipuwafomaduj.pdfIn PDF document text
    • https://kiwotatuna.weebly.com/uploads/1/3/1/8/131856308/wupaxato_sevin_wenarapo.pdfIn PDF document text
    • https://kekisuganuzab.weebly.com/uploads/1/3/4/7/134721312/1132747.pdfIn PDF document text
    • https://cdn.sqhk.co/muvetowiripa/Eifjhgf/pop_bubble_shooter_games_download.pdfIn PDF document text
    • http://hopecommunitynaz.com/life_list_bucket_list_activitiesrnkz9.pdfIn PDF document text
    • http://pr-bux.online/imam_bukhari_life_history_in_urdufdx52.pdfIn PDF document text
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/tidem-sowexubejafopu-duxenozije.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/rivazixexuguri/icloud_photos_android_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/wiremeresegikon/shazam_apk_apkpure.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_off0000d836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD836 5464 bytes
SHA-256: 7138b207c7f0356ef90157925212297b8d89075b7796ef7cf46eb3a03643eb46
font_01_sfnt_off0000eabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABD 11300 bytes
SHA-256: a4f40392be7fa7e1be85f9f15cbe012777d33f3539596ecd1e7ef0cc7a48ba00

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