Malicious PDF — malware analysis report

Static analysis result for SHA-256 158892343bbcfdf1…

MALICIOUS

PDF

69.4 KB Created: 2021-04-10 04:48:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e8ff6843ec3a4c256ef4abd3ff930c59 SHA-1: 6957188918767e110f75725788a77ccf60a74163 SHA-256: 158892343bbcfdf15c38d97cc03795b2a5d1687dddd4331104f492eb8ae6368c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to a suspicious domain, likely used to host malicious content or redirect the user. The document body, though partially corrupted, contains references to 'Wordpress plugins' and 'wkhtmltopdf', suggesting a lure related to software updates or a tool used for generating malicious PDFs. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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://xezojetit.ru/strik?utm_term=wordpress+plugins_url+https
    • http://chebsvet.ru/xepurugasafugedou259b.pdf
    • https://cdn-cms.f-static.net/uploads/4382189/normal_6068d17ac7040.pdf
    • https://cdn.sqhk.co/bitaxukezor/3ggImhi/movijizamebomudulidim.pdf
    • http://a1metromovers.com/zuwexumuxakart756d.pdf
    • http://uchebnoe.website/navneet_samarpan_subscription3r4sf.pdf
    • https://cdn.sqhk.co/xotosobupis/xjijagi/11371452912.pdf
    • http://itfamily.info/54716014325rissc.pdf
    • https://cdn-cms.f-static.net/uploads/4369783/normal_604bc58f93d1a.pdf
    • http://shopmzm.site/24557252839ergi9.pdf
    • https://static.s123-cdn-static.com/uploads/4418383/normal_5fef11f583d61.pdf
    • https://cdn-cms.f-static.net/uploads/4407804/normal_5fd11c5a530aa.pdf
    • https://cdn.sqhk.co/bixatavafut/ihBihgf/tiktok_mashup_october_20202.pdf
    • http://istra-backwater.ru/buxujododr7.pdf
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5fd9800da788a.pdf
    • http://chambreop.xyz/2004_honda_odyssey_shift_lock_solenoidocwd6.pdf
    • http://aromaita.space/fadexoradeletunoxe424vb.pdf
    • https://cdn.sqhk.co/zatejurix/608V3Ol/sudopijid.pdf
    • http://formulamoney.top/364345606lxfaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://d115d978-d96a-40c8-9764-5d959708fc35.filesusr.com/ugd/436160_1245a61b42af4ab8a8401ef7e5ffaeb8.pdf?index=true
    • https://73e8eba8-f08a-4c12-987a-519a82e171c2.filesusr.com/ugd/19159f_6dbf97bbd05a4c77bdcd3fb71306671c.pdf?index=true
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_61e42bdee6784ecda8d2006fa1d068b2.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c699.bin
19fe6d3511270ee3ff4fbce704f5f4a9fb9182a4344e37e40a38d55828b07e20		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC699 3312 bytes
font_01_sfnt_off0000d27a.bin
c22b5970640ae808745590bc062db8cd133f315108bc1844c147e5d96f7e3312		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD27A 5056 bytes
font_02_sfnt_off0000e3be.bin
78866d30d999b7a7bc72c01f714c1dfe5561064deb8c29a2891f571116429904		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3BE 10116 bytes

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