Malicious PDF — malware analysis report

Static analysis result for SHA-256 0029252a38bfef8d…

MALICIOUS

PDF

77.2 KB Created: 2021-09-02 19:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3fc9db70c86c234968791030b76e9e2a SHA-1: 58e37a6eb614d859ec058acb6952192eea627556 SHA-256: 0029252a38bfef8d319a9f1e4eefc268411527527fb326aeb6eae858540cb3ea
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malware. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the nature of the URLs and the heuristic firings point towards a malicious document likely used as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://smidgel.ru/uplcv?utm_term=printable+weight+loss+measurement+chart+pdf PDF link annotation
    • https://cosplay-expo.it/ckfinder/userfiles/files/69865207091.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/r942s6i8ik6opb4kidtsskgm2e/45015205559.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4269bead8---puxakazerabur.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d315b168f8d---dokomiwaporofifofazap.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/30119782495.pdfIn PDF document text
    • https://helicopterleasingservices.com/userfiles/files/tijebasi.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/vsntvte9gu3oipqtv64h42udda/2580377208.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/ximakotufej.pdfIn PDF document text
    • http://apvn.info/userfiles/file/nifekapaxokopozima.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16099ec0eefa8e---95535239836.pdfIn PDF document text
    • http://webcertain.ca/contentupload/fckeditorUploads/organization_/file/80893328716.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/jewajuxiruv.pdfIn PDF document text
    • http://hansungidschool.com/userfiles/file/migikizetoguluvovejepoz.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/kulasitevidikuderuso.pdfIn PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/deduluname.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/nitefibiwikigedejelaxus.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad671892dc9---89875048106.pdfIn PDF document text
    • https://anjingliar2.com/contents//files/nekazonejujidujekemered.pdfIn PDF document text
    • http://www.madiran-cruduparadis.fr/ckfinder/userfiles/files/81881520304.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160ed69d844024---pikarefojozeko.pdfPDF link annotation
    • http://macro-e.com/app/webroot/userfiles/files/pejomovu.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/cagf7sn92en6hprsp42nmp0usd/50736570964.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_off0000c528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC528 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD3A 17908 bytes
SHA-256: 20171a71fcb051c9db354cd59e7729477360717ed9669aae4b4d1a0e331d61ac
font_02_sfnt_off00010c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C54 11396 bytes
SHA-256: 06143d04c7b9e39894100fae46539489e95e56e589e6919e5ac1ca4b56f88028

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