Malicious PDF — malware analysis report

Static analysis result for SHA-256 db2b08ff69b7b95f…

MALICIOUS

PDF

101.5 KB Created: 2021-07-01 13:03:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 38a58169bffb72d6b277ad38f01b388f SHA-1: f9c3e9fe4516a7b8be87c4ab672c612523b4e6a3 SHA-256: db2b08ff69b7b95f37f432f4f0a2dfe12cd2bba0af2b4062c8e43420efa0095d
196 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malware. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic suggests the document instructs the user to copy and paste content into a command-line interface, a common tactic for executing downloaded payloads. The numerous embedded URLs pointing to compromised WordPress sites and other domains likely serve as download locations for secondary malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://medob.org/SITE/files/editor/file/legafosebi.pdf In PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160757a1bb799d---jamudewisizariba.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609603305c52d---bafixupawoxatunujifatekog.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b6a75e616---61034745335.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/40430434031.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/o0bbleus87ekor5nfog5nk35es/kojinolese.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0ac9116a3---98845268477.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210615020640.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/c01p8u5tma5vjqsebev7nsqam4/54234763079.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/wikajumusofebinolasojoj.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/62df01b2a159f1ec388309d63dcd7b47/65843042881.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/5277c33ff2f5dd988c92fdac062a1633/38787326382.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/a43c1e8149a81d8873bbb67925bde419/lazamadilunetibupuwigak.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1451ab948---27313616361.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087858d81700---66268830220.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/vt3s49t42o28q72092egldh3c7/43949486781.pdfIn PDF document text
    • https://soft-print.pl/app/webroot/media/files/sawarusigepewa.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/v6hsos0s0119unb8uql850qios/14626478336.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6ea0c1feb---80974275829.pdfIn PDF document text
    • http://menafundinfo.com/userfiles/file/xoloxegelutevoxobavix.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0a1905d6da---84595872245.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=dependency+injection+in+c%23+interview+questionsPDF 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_off00012cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB6 10276 bytes
SHA-256: 0bc893c4f0221ef646f38a927fb62b35fe0c0715f9578af30d6ae95c81d6f0f1
font_01_sfnt_off000143ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BFC 17120 bytes
SHA-256: 26f00c3521a6db2892976f7825471f257bf7f07057c73649cca1d306e6776f58

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