PDF malware analysis — malicious · c284471e68cb12b4

MALICIOUS

PDF

70.7 KB Created: 2021-09-06 15:05:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 1a214aa0f5861a0b10acbc4bf8f12566 SHA-1: 23ef1a69a869fc6b69267488e725e530a3a24cfd SHA-256: c284471e68cb12b40619f861ad8ed5ea286fdf28fdceecd9b4d124cd6d4d8f9b

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to potentially compromised websites, including those using CMS upload storage. The primary attack pattern involves luring users to external sites through a collection of links.

Machine Learning

Nyx PDF Classifier malicious score 0.8295

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 https://archism.ru/uplcv?utm_term=volcano+landforms+pdf PDF link annotation
- http://akekaluck.com/ckfinder/userfiles/files/3896076972.pdfIn PDF document text
- http://contentworks.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606d26bc62308---96670011461.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e931b8f681---96651301417.pdfIn PDF document text
- https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102b3670be9d---porufo.pdfIn PDF document text
- http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f5908e375---junakizale.pdfIn PDF document text
- https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16070ea06d3a13---duburone.pdfIn PDF document text
- http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16124d66c2ba3f---89821911618.pdfIn PDF document text
- http://teakdeck.pl/files/file/gobalexuwemej.pdfIn PDF document text
- http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/14010811345.pdfIn PDF document text
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160b796098b05e---17720295589.pdfIn PDF document text
- http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/icevk15d0ura8naij9rrld3t23/5621155058.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c125d4ef4a6---kewafoluvigimegivam.pdfIn PDF document text
- https://irastuff.com/admin/ckfinder/uploads/files/70528637686.pdfIn PDF document text
- http://hiro-seiko.com/upload/files/zulanixujuze.pdfIn PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/81b63b705538c0e465ae722efc22a6e1/darasinizolugefelif.pdfIn PDF document text
- https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/99gcgibfo5big8j56odbo09te4/51561427454.pdfIn PDF document text
- http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97e7a5165b---xanuxuwopelevamorusevo.pdfIn PDF document text
- http://tofuyatogo.com/uploads/files/73580657740.pdfIn PDF document text
- https://divinenine.net/userfiles/file/tiropebexafovanemajubu.pdfIn PDF document text
- https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a16d7134d66---gavedematawafasuw.pdfIn PDF document text
- http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d19951380c4---11013834283.pdfIn PDF document text
- https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/c0707252ea86b4c364e0f5af80abe203/81310353290.pdfIn PDF document text
- http://www.deopendeur.org/imgUser/file/55514470493.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e2a9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2A9	10428 bytes
SHA-256: `38b5603085153bf728cfb00eed9346d804c67447e205d3a21b3b0af74626c169`
`font_01_sfnt_off0000fa42.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA42	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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