Malicious PDF — malware analysis report

Static analysis result for SHA-256 001d973385b5965e…

MALICIOUS

PDF

84.8 KB Created: 2021-09-07 08:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8374338999ea407bbbee003eeb57a9ab SHA-1: 999c58d43ed2cba58dfdd3ac8a3ed6c0d7072729 SHA-256: 001d973385b5965e472e8b3664f3e7ec51480f1c3ede7d9966d685d3d48e6280
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the heuristic findings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://indiansabroad.uk/userfiles/file/60063236231.pdf In PDF document text
    • http://rustproofingottawa.com/userfiles/file/virupukadamesurorabigonel.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/37547200455.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b423b641ca6---79885375092.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/bazomaju.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/e8b92a48e43361ac4eef1a15d2b529d0/noxoxe.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/e4f612f2a06758a8ffb1cb23174b4ae6/fefokenuzasiwolonokil.pdfIn PDF document text
    • https://goldgreiner.de/userfiles/file/xikub.pdfIn PDF document text
    • https://bacninhonline.com/webroot/img/files/wuguduxagidigasorumuxa.pdfIn PDF document text
    • https://www.domaine-vrignaud.com/ckfinder/userfiles/files/63128037303.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/928i9hfj10b5bi5u5nrm4dtvjn/kagamebe.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/ctmmsfph63k2on0gij2459vc44/dapar.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fa8177392---55785435836.pdfIn PDF document text
    • http://vinhthuan.asia/upload/files/kirokijaj.pdfIn PDF document text
    • http://anhhieu.vn/hinhanh/file/44270984045.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/gqbs60vci94s7eeeh69mdk24no/kagodu.pdfIn PDF document text
    • https://sreekanakananda.com/ckfinder/userfiles/files/tifevaxolupovinavoberuzo.pdfIn PDF document text
    • https://myhoteltrip.com/userfiles/file/10048535372.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c99378f04f5---vexapategorumogofa.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/19293849190.pdfIn PDF document text
    • http://blackhorsesc.pl/userfiles/file/birebe.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612861463ee9d---kaputaxafilerujowewok.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f47352e6c---xivexa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=sell+like+crazy+pdf+drivePDF 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_off0000e6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000feeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEB 18084 bytes
SHA-256: 4fc23591b0467fe9cece1051e7d3d1d4d0d454b585db7950152b635708e2c0b4
font_02_sfnt_off00012da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA8 10532 bytes
SHA-256: a0dc792ed783210f40344c7e8d1fee926182a274eb619b512990ed32a9888d3b

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