Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6b8dd3b47a46f02…

MALICIOUS

PDF

86.9 KB Created: 2021-06-28 03:56:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a1abbc96575241ad20897429d95039e SHA-1: 90f47df9c53487c647d0f8b2f3f627e66f5da113 SHA-256: d6b8dd3b47a46f022059ba231f07d04f088716afac855b1bfd3224b1aacf623c
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various websites, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and link farm nature suggest it's designed to lure users to external, potentially malicious, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/1bed7bafc1eab1738d39b66fc7f415ff/mazumoxewakogev.pdf
    • http://mtprospectbaptist.org/clients/7/74/74f10a8404da00fab064704771972c19/File/ragilix.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/184c6rpbkrn3g4s5urot0q1vdv/31022850672.pdf
    • http://unipsyclinic.com/userfiles/file/20210523054756.pdf
    • http://coopmong.com/ckupload/files/761932888.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a75b925b19b---4067185984.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608493240f73b---tegasizisolijowopuweri.pdf
    • http://adabaskimerkezi.com/upload/file/35813036635.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b1763b4467d---dipexeka.pdf
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16094ffb2d5714---24203653785.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b6fd884ef---27088102264.pdf
    • https://kimtuong.vn/isc/public/files/fckupload/file/teximenenasono.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/528cf94035f82a70871b2e6963f80b66/84300775754.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/d286ced217fc2f010d57edfbbfe124e4/tulufifoneralo.pdf
    • https://cleaner.pl/userfiles/file/zigefarujikavunevamog.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f746042e64---50018671311.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00ca02ab7e---54137794892.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607abcdaf1b97---rexatujewojakekiwib.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/fb41834598524e23b2b51212b39c2bb9/7537115393.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/f9f23722b9c2756c5ebeefb95b404681/94081530335.pdf
    • https://mecaniquekd.ca/upload/file/39492669700.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853b5777fab---laxogew.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=what+is+foliated+texture
    • 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_off0000f1fe.bin
44dab9553825737c60837ae861954ab04fa2ccb9e72a0ffc51b277eb9e681804
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FE 10544 bytes
font_01_sfnt_off00010a35.bin
c3fc854d5904c4ce4588acc995586c896b85c696a3a0c58dabae5ef48b7f7e5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A35 16532 bytes
font_02_sfnt_off00013523.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13523 16792 bytes