Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa75db700ad8666…

MALICIOUS

PDF

70.0 KB Created: 2021-09-25 12:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 504933642f1bee0c2c490a1097219ec8 SHA-1: ad58ae9a5fd67ad6c6f3c79489aaadcf8010286c SHA-256: eaa75db700ad86665e0d0605c51e06b484a1943357358bd58917fa019a160661
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are structured to appear as file hosting or user uploads. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of link farming on disposable hosting, suggesting a malicious intent to manipulate search engine results or distribute content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification. No scripts were extracted, but the extensive URL usage points towards a phishing or content distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://catamma.ru/uplcv?utm_term=best+police+games+android PDF link annotation
    • http://maschimaurizio.it/userfiles/files/21287922739.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/42408333231.pdfIn PDF document text
    • http://mywayrtk.org/userfiles/file/dupumeki.pdfIn PDF document text
    • http://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wujibofajajavomiwifa.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021913015383316.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/pawifimuzofegozoxaki.pdfIn PDF document text
    • https://xn--22ck6bdp5cach0mc23a.com/ckfinder/userfiles/files/90060498288.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/muvinozigizu.pdfIn PDF document text
    • http://hotelclinton.it/userfiles/files/xikap.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/rilekijufajadubi.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/takekunaki.pdfIn PDF document text
    • https://stop-remont.ru/ckfinder/userfiles/files/59045239968.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/73023471745.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/guzedamogizofuvip.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/3572612064.pdfIn PDF document text
    • http://swapnakoodu.com/fck_uploads/file/fatamefajezuduze.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/96860079135.pdfIn PDF document text
    • http://webcertain.asia/contentupload/fckeditorUploads/organization_/file/69700313781.pdfIn PDF document text
    • https://mywayrtk.com/userfiles/file/duvorukolixugetetoti.pdfIn PDF document text
    • http://indianamartialartsfitness.com/flash/indianamartialartsfitness.com/file/rifomojuwelip.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/pulafavi.pdfIn PDF document text
    • http://www.cemeba.com/uploads/ckfinder/files/jezobonaradavelotiwogon.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/7009c134951d2683ba1cd2a046b37905/6447200942.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/9331769881.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_off0000b2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2AE 15464 bytes
SHA-256: 942f4a19e09ef67d0bc7a24408124fc2b3052cfa4599bbdd4ca00078430afb48
font_01_sfnt_off0000d946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD946 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f15d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15D 10908 bytes
SHA-256: 307621a3f14c45dc9dace505f4b78dda845e2ae29f37e4733c98e60a08cd409a