Malicious PDF — malware analysis report

Static analysis result for SHA-256 47e0506e7f032e14…

MALICIOUS

PDF

70.9 KB Created: 2021-05-24 18:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ab81f93bf115753732f09f1c9d98528 SHA-1: e10a59d8776d17ead2614025c63644f80dd96dae SHA-256: 47e0506e7f032e1420b99230f90f8fff721e86d1a61d2580c7362aa2f9346051
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body is heavily obfuscated and unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/6ae8835e110ed79bf911a161dccce897/bokonu.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073c9a69ccb1---lebififujozikolomovuw.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160805430c682e---mujuxikujometol.pdf
    • http://asupuro.com/user_data/image//file/11212365446.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c61d6749ee---79078404009.pdf
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/451d9b4eb524fe6b66c4382eddf5c211/relufipinegofet.pdf
    • http://midel.me/userfiles/file/sozaxanorasavavuzu.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/43deb902e6a7c018ef0ad79e230216d2/dadijujiku.pdf
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160817b431fdaa---71684561413.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080615ff21f2---mugizanajesurujeduj.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071821cd49f7---87162489373.pdf
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608a6da212bac---26939087843.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/b5f19df89603943a0a54da74c99f4a29/pudil.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16092cf2ac152d---sebupepafixim.pdf
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/08cb849da2cf464d6198936aada77c85/71693905493.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/1be54032ecda0a51a00a62cf9ba72f66/92356042997.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/7e74be2414fcfc0f393c17a880d917f6/foxagesikuja.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=brio+water+cooler+beeping
    • 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://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0a9.bin
e6449f2da6d1bd83af8c6bc219f2710bb88043224755ca53ec3a3e7e2192c35a
pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A9 3788 bytes
font_01_sfnt_off0000ce32.bin
49cfffa690d899bdb728f446144cbad1623b7135aa975e7c09c910f372634da4
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE32 4992 bytes
font_02_sfnt_off0000df41.bin
1ae47ca302c946784dd94ce64b4005f9ac4e557830cb3fd1f76256b600cf60bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF41 9228 bytes
font_03_sfnt_off0000fead.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAD 4324 bytes