Malicious PDF — malware analysis report

Static analysis result for SHA-256 eceedeaffc1daeb3…

MALICIOUS

PDF

83.2 KB Created: 2021-09-02 01:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 30ba3e60129ad16fd1924ee749caf865 SHA-1: ef55c6684048f4f095a87d5d2ddacbaccc331190 SHA-256: eceedeaffc1daeb3fbbbd0c839f0dbdd0a1cf7cf4bfdfbe700055a9c1330f58e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution scheme. The presence of external URI heuristics and link farm indicators further supports this assessment.

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://crewmak.ru/uplcv?utm_term=abide+meaning+bible PDF link annotation
    • http://riskhedgetech.com/uploaded/file/97299224560e981a9c9bbd.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/73502397787.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/68541e25e644e92415617501c73afdfc/15009485909.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911164c61cf---topewuponatapuluxe.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e5b318922a---47906032964.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/cb79sob3gok9nbf6vnqe46ndn7/35754279464.pdfIn PDF document text
    • http://4darchitecture.org/img/all/giliwujigokerozitulifup.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/8f5d7eab8116371c377f4aed9cf9e5ca/7211756606.pdfIn PDF document text
    • http://cy2hand.com/userfiles/xiturilikolipakexesikox.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16091026b90a54---81731779536.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/42518104378.pdfIn PDF document text
    • https://iaido-iaijutsu.ru/userfiles_exc/85988952220.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/komelijujiliwowaferikebud.pdfIn PDF document text
    • https://gilboamedia.com/userfiles/file/nawuso.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/rorobotamixewugifudas.pdfIn PDF document text
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076440a051a0---5355199977.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/tkcgru67n8ll008n7lvp6kj9j6/botururukimorew.pdfIn PDF document text
    • http://plymouth-logs.co.uk/ckfinder/userfiles/files/81192439763.pdfIn PDF document text
    • http://trongtinpc.com/luutru/files/72202752027.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ebf0b3300---11313559253.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/suzojiraranuro.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/7b26aed6c546202388046ff661cb99c4/85637350927.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/pimejopuvimo.pdfIn PDF document text
    • 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_off0000e147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE147 17900 bytes
SHA-256: b12ddadaccb5e2ee02b3432de576f877c7307ddeec768b1086e86fb8049c83f7
font_01_sfnt_off00010f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F70 10228 bytes
SHA-256: cb525d33ff0493b23df7c0b09cc140cd1b6cef46e419d6e291741f7f113c6b39
font_02_sfnt_off00012611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12611 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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