Malicious PDF — malware analysis report

Static analysis result for SHA-256 730b855aece706d7…

MALICIOUS

PDF

83.4 KB Created: 2021-08-30 22:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4341b714c36f30cc18aafde39a97478a SHA-1: cd1ff6f255abc17ad020220b5bd0150c8d04829e SHA-256: 730b855aece706d788946aecd176b56fff79941302fa242046b1b0729ade8097
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document exhibits characteristics of an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. It contains numerous links to external websites, many of which appear to be compromised or hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://garglob.ru/uplcv?utm_term=history+quiz+for+class+7+with+answers
    • https://bio-obst-und-gemuese.de/userfiles/file/fifanazijimuzo.pdf
    • http://clasesholandes.com/userfiles/file/76403675914.pdf
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/t0fuh7u3058h8p1r14dq7fou0p/77713407725.pdf
    • https://anjingliar.com/contents//files/movebozawiwukuxe.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/538b76f7ba7b6fbdb4d4d2825e856603/moxajetitozuvolofiw.pdf
    • http://akcjonariusz.com/UserFiles/file/80899386421.pdf
    • https://triatlonshop.cz/userfiles/file/soluwuzupimosom.pdf
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/febusizabebojo.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/t38njaso7dkqu9cj0238dimgsh/povufa.pdf
    • https://abe-rdc.com/userfiles/file/pipanowuvitawilik.pdf
    • http://dotacjedlaoze.pl/userfiles/file/44842285872.pdf
    • http://biznesfishki.ru/files/userfiles/files/50733207099.pdf
    • http://duoctruongxuan.vn/userfiles/image/file/tojiwusidis.pdf
    • http://macro-e.com/app/webroot/userfiles/files/daruduwotezolonupukepi.pdf
    • http://inbond-cn.com/userfiles/file/wogido.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a004ae55d96---guvetarezake.pdf
    • http://elazentrale.de/images/uploaded/file/kepevaraporu.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/14379528202.pdf
    • http://burmeseburmilla-allevamento.com/userfiles/files/xovogula.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa64ad72601---15188203605.pdf
    • https://knoxvilleremembers.com/media/60970077378.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/bs5nt6ld2o2h8bv0qo5ber0q26/91899107809.pdf
    • https://aulacvn.com/upload/fck/file/87311176163.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb4eae44fb---simamevuvaga.pdf
    • 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_off0000e23d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE23D 16792 bytes
font_01_sfnt_off0000fa4f.bin
46ad02403cf792e716158e55d7419f872d9e1ca93f5aeb5e3fa71f78baa947c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4F 16980 bytes
font_02_sfnt_off00012646.bin
c162661c8a4bc1106b3fc5dc4a6e7ac4328f256f5482b46fc3a5e14b49a580df
pdf-font-stream PDF embedded font (sfnt) at offset 0x12646 10980 bytes