Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeeb293cca9cdc3c…

MALICIOUS

PDF

83.8 KB Created: 2021-08-04 16:50:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 90e0e5619d62be3b41131c04f3a6aced SHA-1: 1a54d3bd7a70674e4b03fa7f3c4ed5ef85d3b614 SHA-256: eeeb293cca9cdc3cab7adac0158be90657a9f69aeb20f5ce851c7c850edef676
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly points towards an attempt to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://drafthe.ru/uplcv?utm_term=download+offroad+moto+hill+bike+racing+game+3d+mod+apk PDF link annotation
    • https://bataretak.com/img/files/file/vulexubazajutunapiton.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/wepefobewilubibakeje.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/sexulinoromujemurozigega.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/s90jlvettknc87khn5afc9k7p2/50200064398.pdfIn PDF document text
    • https://bhalakusari.com/uploaded/ckeditors/files/sevizobopubafavugat.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/18398166642.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2a9130311---xevafikakijorusagutiga.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/d37if01sf7nh72nvo115omlil1/gubewenewosirogenula.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b91da38146e---tegijesakibixepidivig.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078f778301af---95882378063.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/nuval.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/pesagosebopup.pdfIn PDF document text
    • http://goref.ru/files/file/51428088672.pdfIn PDF document text
    • http://mobiliteit.nu/files/54321934758.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa9e73f628---sizarilexenovezupodukika.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a6903fecdd7---15978078858.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/nidomerusibuf.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/ruwabifav.pdfIn PDF document text
    • http://ecole.ru/text/images/file/demerurejedazaxi.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/83770730175.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1622172498733984846.pdfIn PDF document text
    • http://icr34.fr/icr/icr34.fr/www/files/files/jixisovidodinudevuj.pdfIn PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/eff43bbe60afe9cd18a5d90e4e556b4d/31117683078.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_off0000db49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB49 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF360 11392 bytes
SHA-256: 752c8180fb0dbdcf6288c0424b5eff5358a997987c2d5e35b3f47a000eb2dd0e
font_02_sfnt_off00010da9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA9 19804 bytes
SHA-256: b8fd6716472e71b927188730c01aaf4794063352b9d08fdc15d9ff144dff7e71