Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ccac1a6d14b3263…

MALICIOUS

PDF

81.2 KB Created: 2021-02-12 11:20:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49c6171e05aaae72ca651fd59aa5a112 SHA-1: 7386a9293d3251c74dbf699a3206780e61c08350 SHA-256: 5ccac1a6d14b326367dfcd6bf8a05cfdb0a69332bb5265cc9d3bdb9eb9205ff9
156 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 of which point to suspicious domains, indicating a link farm or SEO poisoning attempt. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document's purpose is to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=roh+roster+2015
    • https://litazotivov.weebly.com/uploads/1/3/0/7/130740097/4972716.pdf
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/6260880.pdf
    • https://cdn-cms.f-static.net/uploads/4471273/normal_5fd30f735eeb6.pdf
    • https://barurusijibipek.weebly.com/uploads/1/3/0/7/130740419/fajafuwisaj_dupepugemugiziv_fefudize_bejapizoker.pdf
    • http://websporizle4.com/music_to_phone_juiceymohc.pdf
    • http://lnstagramverificationbadge.com/vaxekanefaralenuxesadv2ba3.pdf
    • https://static.s123-cdn-static.com/uploads/4479454/normal_60089bf46457a.pdf
    • https://jixejuterekafiw.weebly.com/uploads/1/3/4/5/134508928/2140138.pdf
    • https://xiforamuti.weebly.com/uploads/1/3/4/6/134611992/192a130c939774.pdf
    • http://kvrovk.xyz/dragon_quest_minecraft_game4x5lv.pdf
    • http://mon-cmso.best/nietzsche_for_dummiesbkh3g.pdf
    • http://naturaitalia.space/badlapur_songs_mingptffs.pdf
    • https://cdn-cms.f-static.net/uploads/4450037/normal_6009ed244188a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xovekolamoxe/90288946220.pdf
    • https://s3.amazonaws.com/silubebebefuju/49668450652.pdf
    • https://s3.amazonaws.com/tamobalasu/wifufebazirik.pdf
    • http://dulubuli.rf.gd/hranin_porucha_osobnosti_a_jej_lba.pdf
    • https://s3.amazonaws.com/dapekufoxiraku/android-_developers_blog_post.pdf
    • https://s3.amazonaws.com/vososasoxumete/lesson_plan_template_free.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f52a.bin
15d150ce3bb0e9c0f3b6359a79b4544316d9df807b1337a96e7aec3fb35f0f10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF52A 4988 bytes
font_01_sfnt_off00010626.bin
8a7f66e632f083efca8b6b53e9772a9a56c2c0a3ad887bfb3830c9972128e906		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10626 16384 bytes

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