Malicious PDF — malware analysis report

Static analysis result for SHA-256 f917e1937d6d04df…

MALICIOUS

PDF

104.7 KB Created: 2021-06-27 21:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 72780e9bd0a4580d6a2620797aa41eba SHA-1: 47a9ef578d20fd30a48d1829f62fb91a95ce6e51 SHA-256: f917e1937d6d04df992c42f8785083783c310036bfc67692727fe0703df7880f
176 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm pointing to compromised WordPress sites. Several URLs were extracted, with one pointing to a raw IP address, indicating a potential attempt to host malicious content or redirect users. The PDF structure and embedded URIs suggest it's designed to lead users to external, potentially compromised, web resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://meta-min.com/files/59884621086.pdf In PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/f6134ff69bcc49a2b76709764d94132d/somanozatotefapejem.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609be4191e38b---76142977033.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a330c554816---suwadusidi.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075ab1b2fe48---18100087190.pdfPDF link annotation
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/47777804794.pdfIn PDF document text
    • http://yjsyrj.com/userfiles/file/robisimemobuwawomeri.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/42130866206.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/krgkueqvfvubq542u3e96f1f5f/12299889368.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/b1e517483012cf40f6ca171b4932e20a/23272223958.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1b44466a7---23684807590.pdfIn PDF document text
    • http://abnicum.com/files/file/53666105412.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/givevam.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/3423deb33ad11e49bfc38ac037b47f8a/sizazajufatiresibig.pdfIn PDF document text
    • https://deltagroup.bg/uploads/file/13711081873.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/biwibiwusujutumumu.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df73deddaa---54074620382.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910a0ebc31d---48850222671.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/gq37v9sd7o16sk2rpmcimvh0p1/rarogofirosoderidolilalo.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e3a2ce1eb---sasilidowolojokol.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/24965672666.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092a736537ad---84274834295.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/65c7udllbos9ub77hp8j1kn5m0/xeponelalirotalenajus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=graphic+design+business+plan+docPDF link annotation
    • 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_off0001357e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1357E 17348 bytes
SHA-256: 9b344aa92f1a4827fc690cdd8a1c97e9e48f5892389082e1e3010a42a872ef7f
font_01_sfnt_off000162fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162FE 10976 bytes
SHA-256: e2c2750ba5d025c7792b64191fade32c0a8bd6a5efef47382ea42c5f35149a27
font_02_sfnt_off00017bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BF3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1