Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e002fe81633645…

MALICIOUS

PDF

97.2 KB Created: 2021-07-15 12:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f7e638a5d98c268ab10674e347c2d738 SHA-1: eeb88a6d5562a56d12097fb3bb156a4611e0fc0d SHA-256: c9e002fe81633645ee669147da58bdd2a35873b3dfafd6d60a8447c119f60c9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous external URIs pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. 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 0.9903

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://allytemp.ru/uplcv?utm_term=high+quality+hyphen PDF link annotation
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/h76cgta863pd75ccfkr89t49mg/kivikavokexu.pdfIn PDF document text
    • http://obchodsezlatem.cz/upload/files/darete.pdfIn PDF document text
    • https://guapa2.com/admin/fck/file/28026338021.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af76b294cb---1755367835.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/fa70deaccdb57ca42809a1c01dc5905e/bobivozekubuzelajeluzop.pdfIn PDF document text
    • http://artospace.com/pics/file/dusikuwifi.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/sfgpqmjsjgq5sgs8cvk1n9k4op/birogubumirulegek.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c01aad1c4---towinigibusolixak.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/1115106111.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b88d754904a---dujejozowuwipo.pdfIn PDF document text
    • https://call-life.com/ckfinder/userfiles/files/512803633.pdfIn PDF document text
    • https://panama4d.com/contents//files/punewenidokitasenod.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/pelowugexite.pdfIn PDF document text
    • http://sakem.org/userfiles/files/kodefakudozoj.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8025dad8d---nomagegojewipuwulu.pdfIn PDF document text
    • https://activepymes.com/pub/file/kazudelevepava.pdfIn PDF document text
    • https://cbconsulting112.ca/userfiles/files/70593217154.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/bebopiwu.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746b5f3701d---regapibufefot.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e183bb50d4---67024669301.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607285f6e8a4b---10354021461.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/f8b2cfb628f8e4dfd5e23447ac48683a/xepavogebifedifogivas.pdfIn PDF document text
    • http://pogservice.ru/userfiles/file/73925419756.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000103e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E2 16252 bytes
SHA-256: bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
font_01_sfnt_off000119c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D9 10492 bytes
SHA-256: 19fe8ff94b360051bfc20d55c6319aadf684ba663cb5f04c4d7c230219a1ca1a
font_03_sfnt_off00014940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14940 17608 bytes
SHA-256: 226ede3596ae9bd2c2fbbd9bc691fdd30240d2caff261f57906a839de61a31ad

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