Malicious PDF — malware analysis report

Static analysis result for SHA-256 86d0ebcd45fa315e…

MALICIOUS

PDF

84.5 KB Created: 2021-07-06 23:21:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 80fbe75bdb619c30a2972154616052cf SHA-1: 1e5b85ecaac2b16796e4c046473eb8e516e780b2 SHA-256: 86d0ebcd45fa315ec08507d35ee967ef4a26a944519c9b26e636e79c7b852a1a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified by ClamAV as 'Pdf.Phishing.Trojan'. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and the compromised CMS upload link farm heuristic indicate a strong intent to lead users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2724

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://nomylo.ru/uplcv?utm_term=dog+in+airplane+cabin PDF link annotation
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/cb7a034c8316a8da17d09253615693b7/32811480495.pdfIn PDF document text
    • http://wamer.org/userfiles/file/mebawi.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/35857068949.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/42038304378.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/55074533659.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/af66455cc25d8f5affa94813be4b4b9b/noxemiwabodif.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5088b0a65---pebevigijafisokemikovupi.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/jijanaxajelixogidop.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/9b5tpn2s19mgjli82a0g6f3mv0/47287998803.pdfIn PDF document text
    • http://silverleafspa.ca/clients/10619/File/21648413318.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abcc311f979---58473542524.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/6941918535.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/9evmvm452mso2r4ckqf1150ioi/59137351693.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/6107242988.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/9agdrr6b5vb9jvo2kt8ojnu33f/filekuriv.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16083ed283ad53---wiwujemerokikokurubajusa.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/ad18a47ee768402cb600678caa1fde1f/44211688765.pdfIn PDF document text
    • http://industrialdevices.in/uploads/85285984451.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/7059cd795bc28c1a9d12f770b18d9276/senepexolipure.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b394539e4---rifujegutufoliduv.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160810de81a3a7---96605380323.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160dc25b49aaf3---gomasumozuz.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/72648330643.pdfIn PDF document text
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e49dc00de---rowusodi.pdfIn PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/jupemejaxewakivom.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/82836727773.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/53570159167.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF330 10424 bytes
SHA-256: 491257c802c49e37392179ce4c3fab73add3dde3c5b4dca4fa6077ecd74da4e8
font_01_sfnt_off00010aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122B3 16796 bytes
SHA-256: d4aee169674715f881ce95dce3fff280ba4a184ed8e626266cc5d6e965ab8f75

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