Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3c605868f6f2b1…

MALICIOUS

PDF

83.0 KB Created: 2021-09-06 02:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6bcee0bc0c007dac66676061fd12cda4 SHA-1: e54e6738c77759a4e56179dbe60fc617fba62e2e SHA-256: ce3c605868f6f2b1e0fdcbe8792dfd6765ae2c4166f0f5bdf7f1c805d3fd8386
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as a phishing trojan. The file contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://oniceh.ru/uplcv?utm_term=gym+jones+program+pdf PDF link annotation
    • https://n-zvuk.ru/upload/file/25039652104.pdfIn PDF document text
    • http://woods-china.cn/ci2/userfiles/files/20210617113139.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/nuxezoku.pdfIn PDF document text
    • http://homespakistan.net/magzine/uploadfiles/file/zesujorubavokenugi.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/f37774687d745113ff17036daa390dfb/wasemoxezizukadoxexutagur.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe43f15931---rowugumadona.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/c7fb28c02dcdf5b29eff5ae2e10a66a7/45349404703.pdfIn PDF document text
    • http://cpspcb.com/uploads/files/3534841311.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/973cd77a41a584dd6463842f4f9e4be7/junodirabafasokik.pdfIn PDF document text
    • https://marwaautorepair.com/nbloom/fckuploads/file/85393053761.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/b1beiujke729v5m8j1bc5f73n4/85547300941.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/8216e87b55121d82f4013421e1b6e850/vipedavopa.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/8b74ef2afe36c76eeee635c095f03050/tufufavokemivuti.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e07d7a7971---wilajawexafavofesu.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fbd1d6d5ea---pedomesikuzenetofe.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/rb418ts613fhn99a31d0vltc91/tudafapuwa.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/26670336161.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a188c8a24f9---doduta.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/45ce12a9417f1fb2cd20ae7664e80b0e/jowopepodajexunurusujaw.pdfIn PDF document text
    • http://qwerty.pl/_data/file/60571047110.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16112cb68ba8c6---vomajutotulapidivi.pdfIn PDF document text
    • https://peptidturkiye.com/ckfinder/userfiles/files/31820458567.pdfIn PDF document text
    • https://emons-verlag.com/testarea/cwsCMSlight/media/files/sujubokinoj.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee0a71503a8---26457620285.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/879a526bd63d7c5c8ee0a739922fda5e/33815913458.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_off0000de30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE30 18136 bytes
SHA-256: 63e1f1b4c79b5426745dad77189767190fa0e039bf54e8dfa21792cae656ee8e
font_01_sfnt_off00010d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12543 10888 bytes
SHA-256: 908d39d6bd310ebee9bff6c42149b5d90bf99a4c42c879f5951131b549cce37c

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