Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0396c8c42da92c…

MALICIOUS

PDF

70.1 KB Created: 2021-09-07 07:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e2608c284d0e9bfcd02c074313f6c246 SHA-1: b492cbcc04fa581de8b8e91743e611feb0cefd49 SHA-256: 7d0396c8c42da92c280d58fdf49a839dc30517f90ee5d47a6655228f25a8b2ab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites, likely intended to host and distribute further malicious content. The presence of multiple PDF link farm heuristics indicates a deliberate attempt to obscure the final destination and potentially engage in SEO poisoning to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b356891cb58---luxibuvowefezaxunuguwu.pdf In PDF document text
    • http://shinies.ru/img/lib/file/nudajadapusopodivata.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/63448505615.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094435f63a99---mixebofozuzaba.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/85108687280.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/68123709627.pdfIn PDF document text
    • http://smflow.in/admin/uploads/file/lukusazuwudugajozuvabe.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d24f04be4bc---baxanonad.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/a0ffc0fdd379ed41d6352c0c30ae92dd/ripotamite.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f74fd2c06be---71047996004.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/pupux.pdfIn PDF document text
    • http://phantasos.org/userfiles/file/47240445349.pdfIn PDF document text
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210707081015.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/nuzudisajifixibedow.pdfIn PDF document text
    • http://glotecgh.com/upload/editor/file/mufidupavafibip.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/33529055666.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e29f83da9---wakepivetuwuniremegaw.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/1leqji8sr1pfooif1no7v2ct92/tekuvuvawure.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/18242817187.pdfIn PDF document text
    • http://miele-service-center.ru/uploads/files/gaweko.pdfIn PDF document text
    • https://kheops-so.fr/ckfinder/userfiles/files/47950512769.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/2dcbca38e4201f47fae47c8d3bcf3039/kuboguvagujedagikurif.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/tugubepezuxum.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/22698423069.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=download+pdf+editor+6+pro+crackPDF link annotation
    • 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_off0000b5a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cdbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDBB 10792 bytes
SHA-256: 7a996802e4041fd2f5b563de8449d65f1a833da8d4b83af7bffd9e8e8b42fe08
font_02_sfnt_off0000e6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C0 14448 bytes
SHA-256: dc708085c77d903c2f0ea61a9c76b044c5773f2a1dc69adc20fe29649f50d12d

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