Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9616e14d5f9612d…

MALICIOUS

PDF

68.6 KB Created: 2021-09-20 06:35:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 702e0dadcf820843be65b25b0762072a SHA-1: d3a04ff68402606a59919686a2cc3faba5cba661 SHA-256: f9616e14d5f9612da44791aebe94a0c59c392d550224900fda2c11d6f163ce29
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded links pointing to various domains. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body is heavily obfuscated, but the heuristics suggest the primary goal is to redirect users to external URLs, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://hobbypet.cz/files/file/ginepifatimokikozakovezel.pdf In PDF document text
    • http://pm-property.pl/userfiles/file/17904871814.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/fezuxinunexujiruse.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/68221424018.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/89840487015.pdfIn PDF document text
    • https://poldercuptrofee.nl/site/admin/ckfinder/userfilesfiles/depubawupatetaputugomu.pdfIn PDF document text
    • http://deforma.it/userfiles/files/dederisox.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/6742677744.pdfIn PDF document text
    • http://we2meeting.com/ckfinder/userfiles/publics/files/17432665522.pdfIn PDF document text
    • https://fitness-sport.it/userfiles/file/27226417166.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/4124739012.pdfIn PDF document text
    • https://shopinhome.com/ci/userfiles/files/61733669538.pdfIn PDF document text
    • http://stepasidemedical.ie/images/uploads/file/54388265292.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/33804889290.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd1f4d3ce6---vipakajatavu.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/15917398315.pdfIn PDF document text
    • https://beldaoyun.com/calisma2/files/uploads/xobuwetabiwomidona.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/69104390617.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16141b5cc53d35---gopuxarukeboxanup.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135570d4286e---89918495567.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/rawiw.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/bavixedagabo.pdfIn PDF document text
    • http://anticacarsulaeborzoi.eu/userfiles/files/tojeb.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/gusod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=jesse+ventura+63+documents+pdf+downloadPDF link annotation
    • 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_off0000af11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF11 11272 bytes
SHA-256: c072634d58da6e76dcd3c15be31047bbf114c5b0e3ff35dcd83397c5b96ca8f3
font_01_sfnt_off0000c9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BF 14264 bytes
SHA-256: 06c29a5872b49f2fe03175f189f37afad1d3b50ce2fe679ebc301b70ccf1b008

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