Malicious PDF — malware analysis report

Static analysis result for SHA-256 601260e56bf3497d…

MALICIOUS

PDF

92.8 KB Created: 2021-06-25 20:02:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: edf73f89c6bc18bcf9097626666d1a39 SHA-1: feff8583622887f9926039a040fbf35fb4cc21b6 SHA-256: 601260e56bf3497dc54351a01e14c1ccc958f5ce31f44dfa36d96ab9c1178444
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan delivery mechanism. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. The PDF structure itself appears to be a link farm, designed to host many outbound links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/950e51a908d9edd4bf8c8c49ec6616f6/46647196740.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/7407397c1b247bd898f05e61d32cbb03/setolasubowo.pdf
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b00cfe061ea---vozovero.pdf
    • http://webinside.pl/userfiles/file/vudowizifogegasobi.pdf
    • http://pulsarvn.com/media/ftp/file/jibamiwixedoza.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a718c7b3c---xuwotanadibigaguwudutepix.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607645f49e2b8---88290253457.pdf
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9eb4edaa4---taruletokirelasuruka.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/94439956621.pdf
    • https://jackyrouxmethode.com/userfiles/file/3915568901.pdf
    • https://techson-cctv.com/upload/file/rulemepi.pdf
    • https://ngusacdon.com/upload/files/35886333697.pdf
    • https://motiv8workout.com/up/files/58774591162.pdf
    • http://www.advokat.com/app/webroot/img/fck/file/35217134397.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/979754c9f5d763e38b5f5a1df42f19ed/39239245739.pdf
    • http://elisa5888.com/shopadmin/upload/files/soloxizojudozigasidomoboj.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/2812c011a7a7f583c850271f8ca228e5/telenozanofag.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab95ae628f---pabibigepilelabakitup.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/46fc9d33aeff0cb7eee6fdbd52cb657c/88336347674.pdf
    • https://auto-rujo.com/images-editor/file/15469924247.pdf
    • http://cabin4kids.org/clients/0/05/050cd0fff5f75fdfd14851583cc0de74/File/wafagezunur.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/06a1f888d86a638636dc18fcd4289fc2/1296004621.pdf
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160775198e9592---loraladotilajepaf.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608707942296a---60786418728.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a418e98a1a2---fadom.pdf
    • http://accessiblevehicleservices.com/userfiles/file/50999823201.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=you+are+holy+holy+are+you+lord+god+almighty+worthy+is+the+lamb+lyrics
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010235.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10235 16792 bytes
font_01_sfnt_off00011a47.bin
d152b72c63700fe5d4192ad9b0ce61df73c4c41ebc9e12538acf20a70d530a29
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A47 18660 bytes
font_02_sfnt_off00014b0e.bin
c8c375dafb64d5d8c854787184594e8146d8d5bc5a52ac3a5a148daf46ba768c
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B0E 11136 bytes