Malicious PDF — malware analysis report

Static analysis result for SHA-256 2245c67cb0fafec4…

MALICIOUS

PDF

88.0 KB Created: 2021-07-04 10:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 27f81e62503bd0b12ef70c293d086b71 SHA-1: 38fe74c090706cbc52e9a2fdc2e96a567a58c744 SHA-256: 2245c67cb0fafec478108cb9e125cdfa037fe71be38be9c62a526ffd9d736c47
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs that form a link farm, pointing to compromised WordPress sites and other domains. The primary function appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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 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://pixomot.ru/uplcv?utm_term=easy+drawing+person
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608576f6b3487---19619439511.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a88fc439120---kuzefoxoxe.pdf
    • http://www.lugashotel.com/data/editorfile/59737353702.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070dec8d5056---60371919343.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/3h4s5tf5rnph7sk4a7ucipe709/mikokozotugufozudikepa.pdf
    • http://batiment-tunisie.com/userfiles/file/narutijawibaliba.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/000d833ac7337f9851ecdf6a80ce2d4f/bakonofon.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16087080b34df0---lapinenen.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af94c6078c7---wanimededemaku.pdf
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/0d940156f0409095d06888233a644a7b/35775846013.pdf
    • https://laurallo.com/ckfinder/userfiles/files/dizupopiniwipipizikovi.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/601b4023eb3a1df547663a5fd4c4b641/soguduw.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e24ea469977b96b578159aabe7122d46/21472945200.pdf
    • https://amursvoidom.ru/media/files/zaberuwodujexawof.pdf
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/41965064670.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/08qcr2diua0oc6ggvufb7g5a52/60794816858.pdf
    • http://areawifi.com/DESARROLLO/userfiles/files/85157060653.pdf
    • http://rowanfamilyreunion.com/clients/28915/File/lodavatejuxirovofup.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085112c94a45---lubin.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/f9743747ac777e7b45d21f4913ce4c28/musesaduzomabuzukiji.pdf
    • http://sola-brothers.com/userfiles/file/10289540561.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/ce466bd721880e0263d7b78d05a08231/zevunimeburaxuwapadawo.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/58e6958855baa712a91a7495963293b3/dafav.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160add4e00c8e5---lomada.pdf
    • http://mtecommerce.it/public/news/file/pebupomuwalatabodozuteje.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b331182680c---9124082827.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_off0000f731.bin
f55d0d93ef2eb2edc8168fc1e1e22278bbd016eaaa0a66eb964b48c84ee90de3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF731 16656 bytes
font_01_sfnt_off00012265.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12265 16792 bytes
font_02_sfnt_off00013a7c.bin
afbd34983728f751e1d874f1103d327a0559d98b4e0df11f1d2e4f534207e887
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A7C 10604 bytes