Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d72b5e0297950ff…

MALICIOUS

PDF

102.6 KB Created: 2021-07-05 02:08:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 329e1d275eea9d97c4b8bd2ccde4ac2b SHA-1: 8afcdb3858a1e4f9f6915118a06bfc221f3dadec SHA-256: 7d72b5e0297950ff9893a275d50caaa5d70be3b36492c130d3b5c9178492c248
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV, indicating malicious intent. It functions as a link farm, with numerous URLs pointing to compromised CMS upload directories, likely to host further malicious content. The PDF's structure and embedded links suggest it is part of a phishing campaign, potentially delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3457

Heuristics 5

  • 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
  • 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://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160722519b106a---kipasubaxen.pdf In PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/204dbae32ce1b3c7522a3771449eadd9/69853499049.pdfIn PDF document text
    • http://adams-gold.ru/archive/image/file/77375107572.pdfIn PDF document text
    • https://prestinieurope.ch/userfiles/files/25983260433.pdfIn PDF document text
    • http://ffarchitettura.it/userfiles/files/76270110123.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/72785573501.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e76a9d665f---gudilixebedujifokajivavev.pdfIn PDF document text
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/84cb5af05468a254f01aa1a373c35949/57137234282.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a5c8be6a07---21407424162.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/mutunizenutu.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/29840129523.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/jnl2pii85lqq5hp6ml60tr0kia/dujedujokufinazotox.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae4b358bb5---zusuxivavowufavutetur.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/9a350da07de951a4b6be08e3915a2164/kijixaveveriraxebiko.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9dd557a5c---53205023150.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0id0656df4e90ii6qm0d7mlmq7/vijemenisotikixigedaxu.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/757d5edd33dc1ce536c9555e47fcc917/zusisodavaratepi.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/8jidub1hk0dm4ogoj4rgdqcqkb/noxolubofiditos.pdfIn PDF document text
    • http://minhphucvietnam.com/uploads/userfiles/file/repofipuru.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/84552241965.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/2e5ec3b264cb5431ccbef803a4d7e3bd/reripafisax.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/28dbdde517b5b7371e9f8490cec56e13/64929961659.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=cordyceps+used+forPDF 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_off00011766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11766 5088 bytes
SHA-256: 76d5328a90c8d6ac312c81c48764a92b7f6710f51fee93f50fd141a154159b23
font_01_sfnt_off000129fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FB 10356 bytes
SHA-256: 8fe96115394163e4db7cc7087d315306e58166dbf0111b2147f73b6888eba243
font_02_sfnt_off00014183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14183 26524 bytes
SHA-256: 0422f92fb3a217fbe097b18e6961ffc43d61e306c98d97a8e39317f9c293ea27
font_03_sfnt_off000180fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x180FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1