Malicious PDF — malware analysis report

Static analysis result for SHA-256 d33c9cd7e15d9600…

MALICIOUS

PDF

81.8 KB Created: 2021-02-27 06:43:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 517d96a7e9b07e363b51e59dc924e9e9 SHA-1: 5941125e6cc06e3281304fc929607d3a8285e0ff SHA-256: d33c9cd7e15d9600c12b1bf5bb8da7e58d98076bf5209f1cf66aa99dac0dda94
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URLs and the link farm heuristic suggest the primary goal is to redirect users to malicious websites, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/wix?keyword=soccer+championship+game+today PDF link annotation
    • https://cdn.sqhk.co/soziwariru/au0hfNX/xanokegozugupalusunuzanag.pdfIn PDF document text
    • http://vatamulejuvovi.22web.org/86074848016.pdfIn PDF document text
    • https://cdn.sqhk.co/pemazekefise/jiM1giM/video_player_for_android_tv_box.pdfIn PDF document text
    • http://buviturowugigew.66ghz.com/mavagesiji.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/76343710107.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/DiecXii/fuvudatukuzuvokilotozafuk.pdfIn PDF document text
    • http://tulakijumipad.22web.org/candy_crush_jelly_for_pc_free.pdfIn PDF document text
    • https://cdn.sqhk.co/koletexun/ohcSEia/zejobukuxopumurarafaz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://natetiko.epizy.com/unwind_characters_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/29806223547.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/11174330214.pdfIn PDF document text
    • http://xaramoturowuf.rf.gd/funny_child_video_free.pdfIn PDF document text
    • http://kisidop.rf.gd/sofodilebugewazido.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/lizililepuwumip.pdfIn PDF document text
    • http://bemijeranokawu.epizy.com/android_vs_ios_global_market_share_2018.pdfIn PDF document text
    • http://juxawewoguseku.epizy.com/achieve3000_answers_soldier_in_the_wild.pdfIn PDF document text
    • http://lubagolole.rf.gd/jack_reacher_book_23.pdfIn PDF document text
    • http://vejemomase.epizy.com/89698257917.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/25790734688.pdfIn PDF document text
    • http://fuwasal.rf.gd/towaxi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67C 5448 bytes
SHA-256: 1f0c4aadcbc20d13476640333eb395b0ba60f20c007ca91d86b12d240fa9265c
font_01_sfnt_off000108ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CA 10240 bytes
SHA-256: 5eff0d923d6bc7c97adb1094b1a9b47c56cc7a68b8b5ed4734288163a316bcb1
font_02_sfnt_off00012be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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