Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbfd7c5a2eb57649…

MALICIOUS

PDF

68.4 KB Created: 2021-09-11 15:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5372ac1ea521f807801993397eddd750 SHA-1: 5fc990412000c490e797e623b8d57856b23e5675 SHA-256: dbfd7c5a2eb5764910b72ede635784189775f7932a6d6f65db2813dce70df0c9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous embedded URLs pointing to potentially compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the structure suggests it's designed to redirect users to malicious content, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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 0 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://huntic.ru/uplcv?utm_term=need+for+speed+hot+pursuit+2+apk+sd+data PDF link annotation
    • http://seanmore.com/userData/board/file/78318543765.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/rapepovurezivev.pdfIn PDF document text
    • http://apartmany.cucoriedka.sk/data/files/lepojaxixixepuju.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/letiwebifit.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/28468839476.pdfIn PDF document text
    • http://addisonplaza.abwingsmd.com/uploads/files/risevirezaxodusubi.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kokavegenosakad.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/59541879622.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/88029934097.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139211d77fec---37507736836.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/8532642019.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161391588b361e---84903345569.pdfIn PDF document text
    • https://sonntag-immobilien.lu/userfiles/files/xedilani.pdfIn PDF document text
    • http://lactopad.com/uploads/files/94401794983.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137d87898f8d---gazevufusibuzanefojen.pdfIn PDF document text
    • http://hiddencliff.kr/FileData/ckfinder/files/20210904_FC725B35DA6918AB.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/nareruxiwufudixemilolibe.pdfIn PDF document text
    • https://living-stone.lu/userfiles/files/parob.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/43517889027.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/juserufadedilifipuligilo.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/28968737519.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/benuxavas.pdfIn PDF document text
    • https://jin-ji.com/upload/files/86671011658.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/21289198940.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_off0000aeef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEEF 13824 bytes
SHA-256: 68a3bf2a0d54e867646d6bf989603f91c272ad28cf4dfcba14386a1cc9cbaddf
font_01_sfnt_off0000d125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD125 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93C 10732 bytes
SHA-256: f0dbb773dd1277a9e5351e103b98a95cb8c92850a2ce45ba7c50633ef32a9509

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