Malicious PDF — malware analysis report

Static analysis result for SHA-256 647a7319f056b479…

MALICIOUS

PDF

74.7 KB Created: 2021-03-03 00:50:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: aefe73f92fc6d6cae58aaa59614f72f9 SHA-1: 5bce5c496ce1e65e41c917f639018c576a70a4e8 SHA-256: 647a7319f056b479708f17efa219e4dd4d5f666e189ddeae71fb328f2b1ef104
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. It contains numerous external links, some of which point to potentially malicious content. A critical heuristic indicates a 'Clipboard command execution lure,' suggesting the document instructs users to copy and paste commands into a shell, a common technique for executing malware. The presence of external links and the lure indicate an attempt to trick the user into downloading and executing a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/wix?keyword=lenovo+chromebook+boot+from+usb PDF link annotation
    • http://vifezitenof.getenjoyment.net/vimowafosit.pdfIn PDF document text
    • http://solapp.xyz/96420988235o5k94.pdfIn PDF document text
    • http://tacfitproducts.com/stickman_fights_vs_zombies_escape_game3fhh3.pdfIn PDF document text
    • https://besunuvoduzusub.weebly.com/uploads/1/3/4/2/134266379/573d5c702ac.pdfIn PDF document text
    • http://redpandarecycling.com/kanto_region_japan_guidergjx6.pdfIn PDF document text
    • http://tujidal.mypressonline.com/20698354792.pdfIn PDF document text
    • http://xomunuxeju.sportsontheweb.net/20279781994.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/panasonic_phone_turn_off_silent_mode.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447434/normal_5fe18ec9a0d32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377931/normal_5fd7835d88bbf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/polexebuj/adobe_animate_free_for_windows_8.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/76155822867.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/dragon_quest_11_character_build_guide.pdfIn PDF document text
    • http://zibelasavu.atwebpages.com/how_fast_can_a_50cc_scooter_go_km.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/nafikoseleb.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/vukidusufasoxezomo.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/puwidijazoguxagonep.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/79616865768.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/xekajiwoxevusebiwelud.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_off0000e97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97B 5084 bytes
SHA-256: 6399bb28b3161edabf15365740efe4fa4ba99589c5ae313cc9bf6c4966782ac3
font_01_sfnt_off0000faaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAF 10296 bytes
SHA-256: 644839d8061e6077bad146ae3497606993d449bff8e6df28029fc5c6f6f076cc

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