Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6a26608303fd89…

MALICIOUS

PDF

75.2 KB Created: 2021-09-17 04:31:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5ab466356911af9a261818cab166ecb3 SHA-1: 9147a4663bfdb1f49a7fc6c27f19c8288083f47f SHA-256: db6a26608303fd89d51fbd6f198cba196cb409d6b4f2e34d4244544869d81739
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded URLs indicate a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=bhagavad+gita+chapter+16+pdf PDF link annotation
    • http://www.petercar0937494634.com/upload/img/files/kimalat.pdfIn PDF document text
    • https://blogsma.com/files/migifojalirufuvexeren.pdfIn PDF document text
    • http://myphamnanyno.com/luutru/files/94836779891.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/32276154768.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/mevasamapupuraxamegepif.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/86454038322.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16143c6d6293e3---97256910746.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f3ec2b8eb3---22984293580.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/puxelu.pdfIn PDF document text
    • http://uat2.hkha.com.hk/ckfinder/userfiles/files/tavusabilotovawagu.pdfIn PDF document text
    • http://studioassociatoemc.com/userfiles/files/saxete.pdfIn PDF document text
    • http://chinhsuasolieu.com/media/files/nobetewiparane.pdfIn PDF document text
    • http://rayanchem.com/d/files/lenusibabesewofesuverej.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/siroselugox.pdfIn PDF document text
    • https://www.canoe.ro/Extras/ckfinder/userfiles/files/30121722291.pdfIn PDF document text
    • http://xn--365-pn7mwb654m2qn.com/ckupload/files/7769658063.pdfIn PDF document text
    • http://boathousebrokerage.com/userfiles/file/vupazoloniko.pdfIn PDF document text
    • https://valergences.fr/userfiles/file/27194040092.pdfIn PDF document text
    • http://www.americaninvest.net/upls/files/rexasibuwe.pdfIn PDF document text
    • http://findingthegrey.com/userfiles/file/73100860043.pdfIn PDF document text
    • https://www.confirmedtour.com/files/10237557264.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/ropoxekedowulemura.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC191 17352 bytes
SHA-256: 9029d34b9d80816503e11e0bb1de6f9baa280c250c4c2ff6517aa89033d9f48b
font_01_sfnt_off0000ee09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE09 10800 bytes
SHA-256: 26ae956a841d51c22e275aab0b88409444db5c0cb0d2ff9872833a469a5b633d
font_02_sfnt_off000106fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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