Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a05ac3f97b1e96…

MALICIOUS

PDF

83.2 KB Created: 2021-06-29 20:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20eaea885297b859bb0c65a93eb57c2b SHA-1: 164f0992d7fa94a3db1024ee3539af09a15c82ee SHA-256: 91a05ac3f97b1e96000413b019217131901a22caee5d43ca771426779f94403c
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lure users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its intent beyond what the heuristics indicate.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/62d5b58b973eefaa6b478b396adb6d02/37514865462.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ef9a7471d---lojage.pdf
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/tfdguu9klk42vgovqaj798jfk5/nusapobirijenefi.pdf
    • https://bosgo.mn/uploads/files/lepumunim.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/5j4v9gt42rk319pafl6e2gblqa/tetifusojav.pdf
    • http://okmarin.ru/userfiles/file/425294132.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/aj7p749gct7dcunqdch2qhcore/dozeludenarumato.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/16083a65d09a1d---99408002595.pdf
    • https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d38057aff5---vikoxapizokatam.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a08fb1150e8---36977846078.pdf
    • https://gtselect.fr/ckfinder/userfiles/files/55379481967.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c7d673c04---65064132056.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b984e2875dc---15606120009.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16092318610f1c---8918620060.pdf
    • http://davidhammerstein.org/userfiles/file/kakolowakafawijesadegifuf.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffa32a1d8f---febuk.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ff39491bf---vorejetiwonawe.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/5392572b830b6f28c50c35ad3d5ba049/wenovexu.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608f26d0ec76d---45091899797.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/17iqu68nih4qrklmc2foldiblr/mewuraxemogetofe.pdf
    • https://tucarrorentacar.co/ckfinder/userfiles/files/jebodosavodotematirop.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a570583313---91998192669.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b13bb53feba---18460286682.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=grilled+scallops+in+foil
    • 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_off0000e27b.bin
d56d42d27c4e34d2e525493a673f573264d05dda10e0f00054500fa3a024ce58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE27B 10552 bytes
font_01_sfnt_off0000fa93.bin
bbef5ea676cfbc4a96e9eb61f4de240b6a3b6b3950b59e9d51e26af7a88ec56b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA93 17292 bytes
font_02_sfnt_off000127cc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127CC 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.