Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7d624f7319a481e…

MALICIOUS

PDF

93.0 KB Created: 2021-03-25 15:18:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5e95f810573d8f4f60cfbf325b34d5e1 SHA-1: f2fb8fe1cb1f97094c41a22d26d22acbb06484b2 SHA-256: f7d624f7319a481e36097e25eb6a43f06a1da699d6be1f21dfda74e9148550c8
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a phishing attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a non-clustered link farm on disposable hosting, suggesting malicious intent. The ML classifier and ClamAV detection strongly support the malicious verdict, classifying it as a phishing trojan.

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://midufefew.ru/strik?utm_term=do+percy+and+annabeth+kiss+in+the+mark+of+athena PDF link annotation
    • https://cdn.sqhk.co/dofofigeniso/ngcLdjc/petta_tamil_audio_song_masstamilan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473340/normal_60437885d3a38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380395/normal_6038b63aa8f03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388181/normal_5fd0895af1e27.pdfIn PDF document text
    • http://closemaze.com/replacement_ridgid_shop_vac_motor6r4uk.pdfIn PDF document text
    • https://rasozonikazip.weebly.com/uploads/1/3/4/9/134904665/5779292.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/hbggGd4/ideas_for_bathroom_floor_and_wall_tiles.pdfIn PDF document text
    • https://wifusudufasebo.weebly.com/uploads/1/3/5/9/135992472/tujotikejebovuv.pdfIn PDF document text
    • https://cdn.sqhk.co/luwivimexu/gj2eihk/68773789483.pdfIn PDF document text
    • http://shopwithsale.website/badiou_in_praise_of_loveggfa7.pdfIn PDF document text
    • https://cdn.sqhk.co/mozoposowi/ZlUiagc/fosasava.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_8bb693d8466d46c3a8f82cc754bd28f0.pdf?index=trueIn PDF document text
    • https://1b53f64c-3596-40ff-86ea-95cec8902569.filesusr.com/ugd/838e7e_32604175392f48388ca7d534ca22fef2.pdf?index=trueIn PDF document text
    • http://luzavevamafidix.epizy.com/hp_p3015dn_printer_driver_download.pdfIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_06f810c6f0fa40958bb18d07f119ce22.pdf?index=trueIn PDF document text
    • http://ratesedefavure.epizy.com/mathematics_game_theory.pdfIn PDF document text
    • http://mafakizukizunof.epizy.com/environmental_compliance_report.pdfIn PDF document text
    • http://bofejurereme.rf.gd/price_of_skyworth_tv_in_nepal.pdfIn PDF document text
    • http://lapamapifutul.epizy.com/what_does_an_internal_auditor_do_on_a_daily_basis.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_off00012ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF7 5668 bytes
SHA-256: 282b9a937554b80785560de47b62a130327a785bdb15283a8f8582d1d01a9ace
font_01_sfnt_off0001421b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1421B 10628 bytes
SHA-256: 533458defe4b3d7638d17bc94cb9dd45f1dbce6923e3edd0277346dc4a34006f

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