Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ebe2d46431f850…

MALICIOUS

PDF

75.5 KB Created: 2021-07-05 12:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dfeacce5ce63b4b19476e7202f849669 SHA-1: e1bca8cbfcaac461804b271145881f3ebcfae676 SHA-256: 97ebe2d46431f85080f63a10c2c26aed7cb07928a54a51f913d6571411ff3aee
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external websites, many of which are hosted on compromised CMS uploads or disposable domains. This structure is commonly used to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://aadhaarretail.com/administrator/imagetemp/file/8084636899.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/593db6b375c7e76212af0d24eda5ca8a/xujokoj.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfaf917ce8---bepitimesutewava.pdf
    • https://elektrona.cz/files/file/27617761654.pdf
    • http://i-biohealth.com/files/57170300094.pdf
    • http://mebelhotel.ru/userfiles/files/2359693808.pdf
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c3daedbcdeb---10305698318.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca5539cdcf---lopavoziminodibiz.pdf
    • http://retco.ge/ckfinder/userfiles/files/58028539933.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/645556acec969bbcd17e0097880e5bdc/xabexakozivos.pdf
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/nowivivixetesedaf.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/4269vgud5u2h0t2rmvd31gp297/89729342452.pdf
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb29af179b---16246454493.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/eac8a1684a91cae310ec89aa5adf816e/titolawaruwu.pdf
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/bj9o2gali4adcpp3b40vlde831/12218760343.pdf
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608e706fa6b09---13694464715.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16076914e2e5c6---xuvigekigiguz.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d308df449---miwefojopofo.pdf
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/56d5af2ec087362a1179846c5b1e92b2/degetuxedo.pdf
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/8f20e5e8b038a5444e6d47126da1473f/88500665138.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c520eb55f0c---12794459070.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b188623ac68---vubuxaxomiwipodorusonowaj.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+many+gallons+is+26+quarts
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0596533df5---84521870606.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_off0000c54d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC54D 16792 bytes
font_01_sfnt_off0000dd64.bin
55f31043f7235d2be5f2ba0df52e3b08896b888ffc88da30fdd73b8784b9c7fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD64 11044 bytes
font_02_sfnt_off0000f6e1.bin
e26de390b8a37fb0e915824795a386e823ce2dae3da0578392caf1efabd14d71
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E1 16276 bytes