Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f15bc1b1af370f6…

MALICIOUS

PDF

83.1 KB Created: 2021-07-03 07:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 72fb24d1619403af214774b66ec5e6b7 SHA-1: 7f1e5933b81ee26a6d45da70b52789b99580543c SHA-256: 6f15bc1b1af370f6789a0413d14e2ee362dc02b67072b611597c866b1ac09ed1
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as a malicious PDF by ClamAV, exhibiting characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly indicates a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4749

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 https://inwebjor.ru/uplcv?utm_term=asian+chicken+and+asparagus PDF link annotation
    • http://spreewaldatelier.de/img/editor/file/24795544435.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bbac359ed37---doxulebotejomojigili.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608342dfa0795---gojejifefopozoguva.pdfIn PDF document text
    • http://scales-center.com/shop/fck_file/file/30107982280.pdfIn PDF document text
    • http://okuninka-biale.pl/userfiles/file/86514273746.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/qef1gdupdrgfefi9ev1p1obr42/75766017097.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/49950cc57b4fba21a4621b1904d33f8e/jujurisexenuzof.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/c4f85b6aba893fb6e6924bb6cf74764b/15270522617.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/c0a1f09amdt13o1o3tivdn3akh/37031530774.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d85b03830a0---wufobijasivijidi.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc2a81684e3---39435052408.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806214adddd---48939954272.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160c86bf7a463b---38800855812.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb6bd7efa3---bogibafej.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/07decf6575b4bf7a4dd16e25e56e0044/96477487711.pdfIn PDF document text
    • https://grupahatak.pl/admin/_fck_files/file/80763417794.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/26c6ujvooc6bup780kmm8giql4/16585983613.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/601ccee1d4459c3956e90ebdaaecf694/7483208943.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160835797dc98e---97706031025.pdfIn PDF document text
    • http://startmatbaa.com/userfiles/file/89946790048.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/wifipunuxekekopovekokuf.pdfIn PDF document text
    • https://gegeny.hu/uploads/file/8108017569.pdfIn PDF document text
    • https://micsys.in/userfiles/file/78877406134.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/38504102138.pdfIn PDF document text
    • http://dolinakrzeptowa.pl/public/upload/ckfinder//userfiles/files/vuvizirikanusatitifulixa.pdfIn 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_off0000f607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF607 10704 bytes
SHA-256: 805ae17476111dadfa6a66eac987037b007052785ea0b2e7feabd4403fc4eccc
font_01_sfnt_off00010e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12659 16860 bytes
SHA-256: 68f33536e3da52342ea8563e0fdd2d72d4bcece4b460b28ae70a393dc482ed7b

Open this report in the interactive analyzer, or submit your own file for analysis.