Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ceaae8e39c2481…

MALICIOUS

PDF

90.1 KB Created: 2021-06-25 22:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 690dc539b170fa67682ef3ca2c440a04 SHA-1: 499b61d559bef8fc1f6e717b4eef3a6391d11605 SHA-256: 48ceaae8e39c2481a0607cdff4167ae5179c7eb5da118ff760ab645f7f067d4d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as Pdf.Phishing.Trojan. The presence of multiple external links suggests a phishing or credential harvesting attempt, or a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://ketchas.ru/uplcv?utm_term=anime+face+drawing+step+by+step
    • https://livredart.com/ckfinder/userfiles/files/zowon.pdf
    • http://soflocops.com/clients/67403/File/pezagulinujivon.pdf
    • http://shihtzufurbabies.net/clients/d/d3/d383cf0c90cf2d2391705d5438694b4c/File/sukewasejakesezinuz.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/sufewomijit.pdf
    • http://157.230.241.115/image/upload/File/11331669756.pdf
    • https://imotrading.com/images/userfiles/nepafejevevin.pdf
    • http://bioident.pl/photos_fck/file/2021557177.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/vc5urj8vjndul25atfjen23jc5/veminetawazeteforafavofe.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16075ac4f364c0---8433352300.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c947e0b41---22935899487.pdf
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/7uv7bmn6q2a4aqig9h0gnnf52i/litobisawedetofo.pdf
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079bf1e1411e---63930995917.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/6c9145a1aae64ebaf329382c46f86063/1183609949.pdf
    • https://motelandratecuci.ro/userfiles/file/pepari.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087852c37ffe---wekesebaxetamexuxuteton.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071e89a6579e---53883795709.pdf
    • http://stark-tools.ru/images/uploaded/kowemubuwe.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/b4htrg6bt6sgjdmfbj4bdasp24/35012842621.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5b7b7f452---zufur.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/1813a81520ff26142b6fbfd322ed19fd/wesiledipizovudoseni.pdf
    • https://www.temsilcifirsatlari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084066864ea1---bagemelidedakabakajedi.pdf
    • https://www.anandtirth.com/wp-content/plugins/super-forms/uploads/php/files/7rpecvo04ssbj97i6207qc4h61/godegiwitu.pdf
    • https://camgloberealtor.com/userfiles/file/68535348820.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609151f562732---golasuwififogavowokezelu.pdf
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c8840152bee---tosaxudapupajusoka.pdf
    • http://muzeumostrowiec.pl/obrazy/file/84827614856.pdf
    • http://tasteofruraleurope.eu/upload/File/91503840786.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/0c68011b645e902ebc5866d44ab2015c/dulejiwabanupubugiwo.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe6d.bin
d32c90f152e3f7181d7472b8791eaed14ebe992da392f8efad4ab4f081682f73		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6D 16572 bytes
font_01_sfnt_off00012933.bin
791ac0cb18430701a4ecaad581145d225697989ce6b62d91097cc1b361e11796		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12933 11116 bytes
font_02_sfnt_off000142c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x142C7 16792 bytes

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