Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ef5a89fb8b17ae…

MALICIOUS

PDF

88.6 KB Created: 2021-07-13 17:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 48a9860b3264a4a61e34226e787bc90d SHA-1: ec6c74dd5daba3de3c29ce0cda253518f8894de0 SHA-256: 32ef5a89fb8b17ae43a45b6893652a63d726db2dd49778e61fcc66d06421e015
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, specifically targeting formcraft and super-forms plugins for file uploads. These links likely serve as a distribution point for further malicious content, such as phishing pages or malware. The ML classifier and ClamAV detection strongly indicate malicious intent, aligning with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8eeb32225---68100198878.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/bc64b7d93e8c317765be89e669a1eec5/wezivokoras.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e92d964ca4f---ligajamovafidagakozut.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160e24eb9c24ae---49401812263.pdf
    • https://netshopnepal.com/userfiles/file/82477341229.pdf
    • https://branchennachweis.eu/userfiles/file/73418084688.pdf
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/q66sb9h174mtgfg856lggp5691/dajabiparozulisepi.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad53eea7c24---tusixiwefabasajanibejus.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16078ec69d3d02---96970343134.pdf
    • http://paletydozahrady.cz/ckfinder/userfiles/files/javug.pdf
    • http://vina2002.com/uploads/files/mabepirepumenurasexemimub.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160ddd91a6dedd---54179331681.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/6252fccea2c511a83f30ea35c7f3d609/jajamenedi.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c360621bcec---zirovujevipevif.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da2fcbe4b3---36570431380.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ba3a112b853---zuvikiwogapanabi.pdf
    • http://studiogaleazzo.eu/userfiles/files/74778404603.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/ib6mkdfakrs1d5ss3u6s7bgdp7/samifinol.pdf
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/wemuginiruripalulivogat.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160979d86d628f---wilaxezi.pdf
    • http://arcenevents.nl/site/upload/files/vuzajegokopoluxezisupubi.pdf
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160abd779708dc---80603372159.pdf
    • https://hosvagyok.hu/userfiles/file/28541751014.pdf
    • https://almuhja.net/ckfinder/userfiles/files/40733795634.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160cfcf81d7c39---rimevojofubitasegabeperan.pdf
    • http://pvsystexperts.com/wp-content/plugins/super-forms/uploads/php/files/46mgh5h9fs2q07g7d8nmvngk46/41288384280.pdf
    • http://famillespourstarlight.com/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/jibifamuvub.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=post+doc+research+jobs
    • 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_off0000f7c0.bin
27a36a50bf636639399764c8e4e83b49475b8e1eb199d6080df9acda9e91d97a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 17388 bytes
font_01_sfnt_off00012505.bin
76ab01591a40ed97e95318cc202180a64dcdd76b15a442aff72af1ee5bbe0ad3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12505 10496 bytes
font_02_sfnt_off00013d15.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D15 16792 bytes

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