Malicious PDF — malware analysis report

Static analysis result for SHA-256 684142e2b24ec16b…

MALICIOUS

PDF

72.5 KB Created: 2021-02-27 01:08:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 89adbaace651dc1acc3da9e2038bd395 SHA-1: e81df6459a392cb63207705b3b88e4d5d20590c1 SHA-256: 684142e2b24ec16bc533b3d4d576674b5127c8c526a6bef29564cd21e6184522
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with a primary external URI pointing to a suspicious domain, likely serving as a lure for phishing or malware distribution. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://vilenefex.ru/strik?utm_term=kitchenaid+5-quart+artisan+tilt-head+stand+mixer+matte+white PDF link annotation
    • https://cdn.sqhk.co/mujekesire/iiVb2tp/burnout_drift_3_seaport_max_hack.pdfIn PDF document text
    • http://bowofonu.22web.org/vitibopoxojofisi.pdfIn PDF document text
    • https://famepakemujo.weebly.com/uploads/1/3/2/7/132740594/233a51375150816.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452148/normal_5ffac57baa203.pdfIn PDF document text
    • https://dokurawufiza.weebly.com/uploads/1/3/0/7/130739275/kewomir.pdfIn PDF document text
    • https://bozaxadoduzake.weebly.com/uploads/1/3/4/3/134306622/vegitomotijijokeb.pdfIn PDF document text
    • http://1fps.ru/949744892731gujl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487626/normal_6035b28e98456.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452206/normal_60358b9c2c9e8.pdfIn PDF document text
    • http://avbox.org/dolls_house_direct_couponoq7yr.pdfIn PDF document text
    • http://helpcontactform.com/android_game_hacker_software_for_pcrhja8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464739/normal_5fd6492feb7f6.pdfIn PDF document text
    • http://libralab.digital/celo_willie_colon_acordes809gv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446036/normal_60283e4210f00.pdfIn PDF document text
    • http://wovobogawukepu.iblogger.org/camedia_master_software.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tusamovukubug.epizy.com/93118296599.pdfIn PDF document text
    • http://pasezuj.rf.gd/ribbon_bow_3d_model_free.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_off0000d8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8F0 5588 bytes
SHA-256: a1d2895a12d4cd8c291da420d673bc1f9d5df13cef5e5120f8ecabf95bd8a089
font_01_sfnt_off0000ebea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEA 11176 bytes
SHA-256: 803783143ac693e6452a3f1966108a475e9765e8e902b3c044e6e66bcabe6a65

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