Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a16fc5e12b9446a…

MALICIOUS

PDF

128.0 KB Created: 2021-07-27 21:54:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 82addc1f7e1fd64a3393352823cc571c SHA-1: 8bd1f00d1ead267c49e793bf5348185a167e93e8 SHA-256: 6a16fc5e12b9446acf0c71eabe82a176e85553dcf52fe1cc2f29ae0e27cae070
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing numerous links, many of which point to compromised WordPress installations. The ClamAV detection and heuristic firings indicate this is a phishing or malicious content delivery mechanism. Although no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2896

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
  • 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
  • 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://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1f9e7d48a1---fepejudi.pdf In PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/o40qpoo4r3r6a3vl6j00shd2ed/81621933922.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/43b142a664d1f5d84d94398fd49ba115/rumaxinexatazotipesufege.pdfIn PDF document text
    • http://2440027.ru/upload/file/gakerukofidemuleretonix.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c929f3a2bfa---53302884969.pdfPDF link annotation
    • https://farmacieitaliane.com/documenti/file/tusugavamomeruzefatezepo.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/27681219511.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/6026332e3e8fff357c4381b4e621782e/fibagojokulowutabadu.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/45724549570.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/76121765044.pdfIn PDF document text
    • https://lastcallslc.com/wp-content/plugins/super-forms/uploads/php/files/f5e60bd9c1fd01f6f7a3a5ccef845fa9/72340552604.pdfIn PDF document text
    • https://rumusjitu.com/contents//files/senatumeduderaboxe.pdfIn PDF document text
    • https://begili.com/uploads/image/files/fobaniboxiromevipidukej.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7401ba8733---vezikagujibidodujiki.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/lozituwefiwomitarejiw.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/50427351134.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/010002403051.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/6dhm7d5juu6vmqgif9g600m7l8/38964030385.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/79415610523.pdfIn PDF document text
    • http://mousike.it/img_ins/files/ligadijatovogeseno.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f9f5a4701e9---jotije.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c56396a3a18---24095067103.pdfIn PDF document text
    • http://ambulanceservice.pl/userfiles/file/negodogudexavesegoparular.pdfIn PDF document text
    • http://markone-tools.com/upload/files/gowovukeguwopeke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=yaesu+ft+857d+screen+repairPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000127da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DA 17692 bytes
SHA-256: 2e637266acd9a3a377a75e685081c4a75f6554ac95f604f676de1f8f8bb54d54
font_02_sfnt_off00015665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15665 10924 bytes
SHA-256: dfb9416ce845da523e7fe5fd7b8d28d103b389c766693355e1e6d1b1be4277a4
font_03_sfnt_off00016fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FEA 50156 bytes
SHA-256: a0b6f62e3669bf983a8a078d9b4ee47015c2d43b987797e674bc75d583eacede

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