Malicious PDF — malware analysis report

Static analysis result for SHA-256 85119ca100f230f7…

MALICIOUS

PDF

88.1 KB Created: 2021-09-01 16:26:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 414f57f858b91dfd678b20607a0844a9 SHA-1: 2b4813d38cbf17acea860e0b78d8a50a0c5dfc68 SHA-256: 85119ca100f230f7c8db6a76558209cba90d4ad129bfd2905a1b2e9e75071887
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS platforms. The presence of external URIs and link farm heuristics suggests an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8093

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://pistant.ru/uplcv?utm_term=free+games+like+pubg+for+pc PDF link annotation
    • http://rebornfair.com/FileData/ckfinder/files/20210627_AB24C26233C483FB.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/25fa9937eccaa2bc957ed8a0f96b40e1/65286641696.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/lmtlljjcq6is5jgd6k5m1qqcl5/wodobuvaxip.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/bared.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/21g5ladi96qb7964qqjpac8v87/85043092229.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/mkscdtj5p25uch7ukjubm79pdl/diwipetozijonukubapukoso.pdfIn PDF document text
    • http://flatadministration.com/uploades/fckeditorfile/tixanixirekopijavirapob.pdfIn PDF document text
    • http://wilkinsconnection.com/clients/9/94/94ba1e7d864c5c8af3bb481f5f9f31de/File/soxipitirukijevarosumibo.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/81435b4ddf6c5d7295c9055924067ca9/43433412168.pdfIn PDF document text
    • https://shopabrang.com/images/files/13003453383.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b4978d27b1f---kuxufodudapaxobipis.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/88566092866.pdfIn PDF document text
    • http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/fugunotev.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1e2b16ad9a---kemonitojemijobubodanoxur.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/78885669788.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/08707800ac2de35b77d9685523c2e1f8/degolesaroxanomogewusekim.pdfIn PDF document text
    • http://888chji.com/userfiles/files/sevumafiwuputixode.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf53dc78329---nuzukodabelavobapogovi.pdfIn PDF document text
    • http://archi-m.ru/userfiles/file/81731428614.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab7617d8657---45151866728.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b6dd32c52e5---begizewukoxozerebavufaj.pdfIn PDF document text
    • https://micsys.in/userfiles/file/68116104111.pdfIn PDF document text
    • http://zeguvietnam.com/uploads/ckfinder/files/88153408253.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/bopunemomevem.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/1457a725d6705be52861ac602eca7ae4/71519519206.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e8e124f30---98918419260.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_off0001046c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046C 10932 bytes
SHA-256: 3399e2625de44caded8304ed81ec8e63e3229326a045e9f6ad0509c06a484ae5
font_01_sfnt_off00011d82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13594 18196 bytes
SHA-256: 1a6b84df8c2cb198a98ecc99b8a6b05ed5a8067cec2dadf1ab6d0fb2556278d7

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