Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07bda3b9ac29174…

MALICIOUS

PDF

71.5 KB Created: 2021-06-02 09:55:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8da2a0b1ce6879356563309ec186f3c0 SHA-1: a412a2be651aab356a4363ded65b1f75bced4276 SHA-256: f07bda3b9ac29174e131fc3b319e27066523821c1a1397d9d6ffa305068c3877
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains multiple heuristics indicating malicious intent, including links to compromised WordPress sites and a lure for a password-protected archive. The presence of a 'download button' lure and the ClamAV detection strongly suggest this is a phishing or malware delivery attempt. No scripts were extracted, but the document's structure and linked URLs point to a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • 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://irlanc.ru/uplcv?utm_term=dragon+ball+shin+budokai+another+road+psp+cheats
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c6f554096---zemazobizodapo.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db963ad0f4---71129839557.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/b0c4c6f44480b946fa3896a7bbd9f200/51800834685.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35cad657e5---wejinotomikogujo.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076e73368dcb---43984430565.pdf
    • https://calmoinc.com/upload/editor/file/57011024058.pdf
    • https://www.rockfallco.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606df5556b033---92688596207.pdf
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce105ee56d---37005650418.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a26cf049b---vijuremeleda.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160905d0455f91---72339264465.pdf
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/3dc2e529dd4be50653f9ac8299f3561a/13422732348.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2735c2673---42658277737.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d4451e42b---19793317713.pdf
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbe84e1f5e---sasezexejuzuwajagisuwuno.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off0000d8b7.bin
de1f427dba0ca5f0fecefd4718f4b47487c09e55365dd5a4971611e4d85eb04d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B7 5536 bytes
font_01_sfnt_off0000eb84.bin
dfa7ac8dc0b7efde2f8270b9b64ef0cbd0a3a9c5edb5faea4dad0c6ae4468002		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB84 11044 bytes

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