Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c6109b030d4351…

MALICIOUS

PDF

85.0 KB Created: 2021-03-01 23:05:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: ebaf935c59a18813fec347c33a8887e6 SHA-1: 3ae7ef355ad0e465a12e4488a44c6de75b637111 SHA-256: b3c6109b030d435162bc151754588106a89bc5290ee76d9664059e0378c2c93a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or scam attempt, likely to trick users into downloading further payloads or revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/aws?utm_term=how+do+you+do+keto+for+beginners PDF link annotation
    • http://copyrightsupporthelpcenter.com/skyrock_radio_frequence_alsace61g7k.pdfIn PDF document text
    • http://trackcreditscore.info/46327231380nf6lg.pdfIn PDF document text
    • http://sallely.xyz/45821795498zl7ol.pdfIn PDF document text
    • http://connexion-amelii.xyz/betadine_scrub_and_paint_guidelinesptby7.pdfIn PDF document text
    • http://indital.space/brave_frontier_2_global_mod_apkki1ee.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/never_forget_you_piano_sheetvicwk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449424/normal_5ff3d40eb9b6d.pdfIn PDF document text
    • http://gouliwer.online/the_magic_flute_musicsddsh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496818/normal_5ffb682093ffd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374189/normal_601197dfaa0bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471703/normal_5ff0070b70f54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_5fe8656f6b2ee.pdfIn PDF document text
    • http://thedefenseforge.com/moulage_ventre_grossesseoocuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452618/normal_6015b6d0b4d6e.pdfIn PDF document text
    • http://homeolimp.com/is_a_peloton_worth_it_ukspn05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_6025efc5259d0.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/dufekifaral/tazerezifowawisafapovade.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/muporabaroxejam.pdfIn PDF document text
    • http://tobesonev.rf.gd/laveneg.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/film_benyamin_biang_kerok_terbaru_2018.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_off00010f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F21 5192 bytes
SHA-256: 2fb7bd0e1a6d4b53c4ed5255171542b4a4fed5fb2770188aac647fe2bbe8240c
font_01_sfnt_off000120f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F9 10960 bytes
SHA-256: f3b50c45886325816e17b9cd33aa93f63fe7a2f3a504ae203268ac4eab947326

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