Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe063f3baae2dbbc…

MALICIOUS

PDF

77.5 KB Created: 2021-02-25 12:56:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e73dff39c3c634d5b2251f69fa20b7d5 SHA-1: 9b2a9c1ef5d38a8eb63f7c053fc0ede04054be4f SHA-256: fe063f3baae2dbbcb35136f05840d9237e36538f0f5abb55bdc041c2821fb03d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to seemingly unrelated PDF documents, indicating a link farm for SEO manipulation or traffic redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://jacksth.ru/strik?utm_term=bodyweight+workout+for+bigger+biceps PDF link annotation
    • https://cdn.sqhk.co/zoluxoni/eChd9SE/the_beginners_survival_guide_to_bullying.pdfIn PDF document text
    • https://nivosuvadifo.weebly.com/uploads/1/3/5/3/135384950/sodasanevejewo-xazulojominefeg-zipilul.pdfIn PDF document text
    • https://cdn.sqhk.co/vedimofaw/hUhmEUj/70756999773.pdfIn PDF document text
    • https://cdn.sqhk.co/mujexoxa/jiGzVjh/81794153384.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_6033fd9be71ae.pdfIn PDF document text
    • https://wesulabiduzipu.weebly.com/uploads/1/3/4/2/134235649/9876804.pdfIn PDF document text
    • https://cdn.sqhk.co/kupuruvew/jcChcdB/8614337848.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/ibmhbgg/sticker_creator_whatsapp_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496360/normal_5fdbf512d292d.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/WiijgAz/funky_bay_farm_adventure_game_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445735/normal_5fe206e204adc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445888/normal_5fffb25577c7c.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/zBhcZc3/diy_easy_crafts_paper_roses.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501777/normal_5fd147ba4e3c2.pdfIn PDF document text
    • https://goxadivitekoze.weebly.com/uploads/1/3/1/4/131437736/755a39867b335.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446651/normal_5fdfcd928a98a.pdfIn PDF document text
    • https://cdn.sqhk.co/lewenowaxer/L2Zgc6n/toilet_light_running_sound.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500677/normal_5fd14b1d0ff11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449417/normal_5fe575b820ef4.pdfIn PDF document text
    • https://cdn.sqhk.co/tibatojo/fifyjhM/sky_force_2014_cheats_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487416/normal_600363e12c98c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF168 5624 bytes
SHA-256: 1f0e1775c78cc59f31aeded211fdb1af6b63b2b3a2b4173feb0ed8888d787e4e
font_01_sfnt_off000104a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A3 10460 bytes
SHA-256: 10015a67256be183f34a2e5c971466e9d23ed8b4ab44e8f028319a0d02f3f618

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