Malicious PDF — malware analysis report

Static analysis result for SHA-256 68808851079a5404…

MALICIOUS

PDF

71.2 KB Created: 2021-04-04 00:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 735b6695936662e64a9529390946abdc SHA-1: 4365657a14847f3a3ea7c378abc253f64eaf70a6 SHA-256: 68808851079a5404a7fd249a8f3181af702d27ec50ad5e5bdb2ed3a8168edc14
104 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 by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of an external URI suggests an attempt to download a secondary payload, aligning with a phishing or trojan delivery mechanism.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/award?keyword=english+advanced+vocabulary+and+structure+practice+maciej+matasek+pdf
    • https://cdn.sqhk.co/zetoreli/eheXrhi/71815701696.pdf
    • https://xalorato.weebly.com/uploads/1/3/4/3/134317389/7538610.pdf
    • https://cdn.sqhk.co/kofelejezem/hiahjoH/best_photo_crop_tool_app.pdf
    • http://good-production11.site/how_much_is_the_membership_fee_for_planet_fitnessv176q.pdf
    • https://kovepezerolozu.weebly.com/uploads/1/3/1/4/131483153/58ebd8.pdf
    • https://cdn.sqhk.co/gubujurit/fjcvWjc/90890592624.pdf
    • http://1eyvgo.xyz/lozelijivunatifuwufaxumog84tnz.pdf
    • https://xadifopelizil.weebly.com/uploads/1/3/4/7/134771643/valade-jutuba-nafivan-zodofudijif.pdf
    • https://cdn.sqhk.co/mevazasid/Gif1Ggg/nelerijek.pdf
    • http://carluxepaint.site/how_much_are_airstreams_newmcb4t.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0149beca-7196-4659-b9a7-b4c95f552137/pre_algebra_textbook.pdf
    • http://koxolavomuzo.myartsonline.com/fenoponoradonego.pdf
    • https://s3.amazonaws.com/jajoxulabojaso/ejercicios_de_identidades_trigonometricas_resueltos_paso_a_paso.pdf
    • http://zevesijuduma.atwebpages.com/acca_f8_revision_kit_2020.pdf
    • https://uploads.strikinglycdn.com/files/b9ad66d4-a256-433d-8448-ec2cf3d765fa/sovubabutaxa.pdf
    • https://uploads.strikinglycdn.com/files/cb09c284-64f3-47dd-9cf5-025e65863cff/33393276203.pdf
    • https://s3.amazonaws.com/pesetufavo/entrepreneur_magazine_2018_free.pdf
    • https://uploads.strikinglycdn.com/files/6e5ce089-2c90-40b8-a17f-6d7458218d3e/the_masks_we_wear_wow.pdf
    • https://s3.amazonaws.com/timituvupame/35924066689.pdf
    • https://s3.amazonaws.com/vuliwisuwig/19498757317.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caf4.bin
11408aae575add17a7cf03e0e2970e6494dca00f0aa4f33a70678679da566750		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF4 5968 bytes
font_01_sfnt_off0000df31.bin
3fe052cda5868ef9ae994b1db995143d58ea1bf496df3c442134a6eac70b50a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF31 17856 bytes

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