Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa508092dccb457a…

MALICIOUS

PDF

94.0 KB Created: 2021-09-07 14:06:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d30bcf3f5cf2eee0cded075ccf944a7d SHA-1: 72ec8d2b07a073c5fd42e2c953d30efdb19ac9ea SHA-256: fa508092dccb457a431ab02d3c6c53bdc364b4b343e38dc2a8b851388ca6e6e8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The file functions as a link farm, containing numerous URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://philabc.ru/uplcv?utm_term=hipoglucemiantes+orales+pdf+2016 PDF link annotation
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4e531d1288---1616445297.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/68568895563.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f5dcbf2896a---wagofivarasi.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/56532215293.pdfIn PDF document text
    • https://yapluka-services.fr/userfiles/file/gisiposuba.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/5cda6119a8kntvvq3mnqod36m3/timumovitanujobija.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/77526171475.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/vujazododevaxazonarom.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/71907a1243dcce34ef214b98763c4bad/mizawovirevavewaboni.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/39731416570.pdfIn PDF document text
    • https://austarpharma.com/upload/files/lirolexetusajegati.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/zikilivunom.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/ce064cb5e32d19ef9481e8f808c92454/gimigefenedanuruziraged.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/88424387264.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-8/file/48004810719.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/33089611972.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/b4a883cdd1a0ad2a679ff989eb171ff7/jawatolijefalososofugola.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/88519813159.pdfIn PDF document text
    • https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/tizosikevopinefewovu.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/duzeke.pdfIn PDF document text
    • http://15449010.com/FileData/ckfinder/files/20210808_5DE827817D168EC2.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///92975995308.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/93194a87ec7935ee27c2dd3cd2d3eb58/56084688918.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608249c92f1b7---setafesoxevo.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607491a09c765---24587171882.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_off000101de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DE 19804 bytes
SHA-256: 8bc15bc3d3389fcb5ac7bf57794064874c8ed9bcae38bf3067fa02b08dc356c4
font_01_sfnt_off00013518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13518 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D2F 11516 bytes
SHA-256: 847f6f6fb8587c339a84e8028d418074637304f531139c72a0308c519913c003

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