Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08ed183bf23bc4a…

MALICIOUS

PDF

83.8 KB Created: 2021-06-28 23:03:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: df8acd58110ece0794c99b5a4511de7e SHA-1: e08dcd8e4865b41efa72309204e6cc6ca1081093 SHA-256: c08ed183bf23bc4a1365767a27851b7bd04747a9bcbdb7aa0eef5e9b2507fc65
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. These links likely serve as a link farm to distribute phishing content or further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://livinglearningandworking.org/clients/e/e0/e05af8355f71d8da3aa90f500b9284b3/File/86878354098.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2918a3f247---duzoxaruxuxusebavonagi.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/eb51771d8b03b4ff0529a9594fcd49a8/77614207867.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/aeuqgs3m5uuv506qiopjv52ac1/jivewinujaxulo.pdf
    • http://isystemlab.com/admin/ckfinder/userfiles/files/nifowapawudufe.pdf
    • http://irishvaughans.com/clients/7/7c/7cfe0b8ff6d5e3136a6575a9b258a09c/File/44577227382.pdf
    • https://on-call-anatomist.org/ckfinder/userfiles/files/30675579594.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608bcfa64cdf6---zodonalutulosu.pdf
    • https://saatyapi.com/upload/ckfinder/files/funozovegaleje.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607533f8c3cec---jezilironebujudixabipizaj.pdf
    • http://chpcentre.com/files/file/32974789331.pdf
    • http://mispuntossaga.com/campannas/file/puvawuma.pdf
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/putivezoxorevazolozaxo.pdf
    • http://thebrownsfamilyreunion2008.com/clients/81208/File/wukafuxo.pdf
    • http://modellszerviz.hu/userfiles/file/wevejebugodaz.pdf
    • http://davcpundri.com/css/file/fulejewuri.pdf
    • http://etasystem.net/userfiles/files/84273359378.pdf
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/k76n065u8fi2t0ouia49lljrh9/pesuxovuz.pdf
    • https://bitree.com/ckfinder/userfiles/files/foluwifesevulutedibeluf.pdf
    • http://uro-medical.pl/zdjecia/fotki/file/86083031074.pdf
    • http://diysmart.net/userfiles/file/luvimegalaxexikeg.pdf
    • http://studiogallerani.it/userfiles/files/wagotuvozoposumof.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/0c511e038307934ad00aac3e319fbdec/91318151012.pdf
    • http://dzbnf.com/upload/file///14474569627.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=under+jaw+sore+to+touch
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e58b.bin
389f90f17c090063726245dc758730640ed3a53909bd57777756986cb18da7f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE58B 16412 bytes
font_01_sfnt_off00011049.bin
a0555e2583ad22cb0e858943aa67b09731197c7445aca0fac83993591f15caa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x11049 10652 bytes
font_02_sfnt_off000128b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x128B9 16792 bytes