Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaccbe3631be806f…

MALICIOUS

PDF

82.8 KB Created: 2021-07-07 23:30:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: aae49402b2adfd831300c2b61e051810 SHA-1: a69c6460018948723e8d54f2d8b5512bb9313c80 SHA-256: eaccbe3631be806fd5c4bab0560be2762280dcf6721890dbf1a6fdcd0c260d60
156 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded links align with common tactics for distributing malware or conducting phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/5d532cd4018f5013e7e55133436f09a7/dugikubedufekok.pdf In PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f384a7ecdb---94295595051.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/mb4i8d0qbku2su77mhsc428ul0/87881359929.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/23033151177.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d569b090f3d---duzazoki.pdfIn PDF document text
    • http://soflocops.org/clients/83264/File/70265090589.pdfIn PDF document text
    • https://scriptdd.com/_file/file/21991619347.pdfIn PDF document text
    • https://anhhuynoithat.com/asset/files/bukanutovibibimisozibig.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/1rdvsh19hpak7lml6ncfauq4de/zokudexazizudaxutizuriwoz.pdfIn PDF document text
    • http://pinxedien.net/upload/files/bujidiferaxelezeboxem.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/9e8a8dead8a34bb88dabfe2623242f95/livatokugadurugisupuxa.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/49ca2c0dbe91ea57527f5495b792d7bc/15720264377.pdfIn PDF document text
    • https://hfdjet.com/wp-content/plugins/super-forms/uploads/php/files/188f82bd803e867a2c167c71d9ede97b/55837078903.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/48549956918.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f94b4d088a---gesuz.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/rdqv2fsdto921dc44ohepprtbc/16462512213.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/sesilogebaz.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/14889169554.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/gojaxodebeguvadin.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/ucgvnfb78ett1n5isucdrshqcd/sufijoratusifebegamus.pdfIn PDF document text
    • http://bidmitt.com/img/files/file/xisumu.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/esif7ni60v98vih1459lh2n0m4/73908083735.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e27b5dde---teroserarirupofar.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c76fe643258---wemewutis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=denaturation+of+protein+in+chemistryPDF link annotation
    • 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_off0000de01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE01 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF613 17156 bytes
SHA-256: 6356c9803b35abe5ed1d4569427f38e351a8d64edd46269a55576d71a8da1247
font_02_sfnt_off00012309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12309 10916 bytes
SHA-256: 5d189e4ca53b5084084a68ac6b12e377a4551803f72843d9ad8b962f837bac16

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