Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce72d78c7bfb102…

MALICIOUS

PDF

85.8 KB Created: 2021-07-04 16:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8330a4bfdc5c0d7366c53696a1efcdb7 SHA-1: 7a7f66d566f44106266eb7664d0e97dda92a7393 SHA-256: 1ce72d78c7bfb102935ce12033ebd0835fd7040c98dbd989b28fc152e8463e43
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to compromised WordPress upload storage, suggesting it is designed to host and distribute malicious files. The 'SE_ENABLE_LURE' heuristic indicates the document likely instructs the user to enable content, a common tactic to bypass security measures and facilitate the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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 http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c57366241---39846931872.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/01fa84c503726d9964cd82ca81341a66/gesuzisojekalugir.pdf
    • http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/vosijobi.pdf
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160993d16f008d---gozofipojeb.pdf
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c206e1440---wemasubasuwolurimuviwalo.pdf
    • http://bjjiffy.com/upload/tapefelakigap.pdf
    • http://mientaytourist.com/uploads/files/32347141874.pdf
    • https://willmarareachamber.com/ckfinder/userfiles/files/kosowoditadenokipulim.pdf
    • http://kemenyseprosiklos.hu/upload/file/41699833632.pdf
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/lumiriritodurezomow.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/16083b5ed8d4ad---93152786787.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/fd56b5a768981a93b43b72360b7274d5/zepimuzubezu.pdf
    • http://dawahcity.com/userfiles/file/6022290688.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/700f664d8f70d8c5ccf970c755034151/tuxisiz.pdf
    • http://nitexprofi.cz/userfiles/file/sipisur.pdf
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9284ae90c---rurotuparatetigolokotoxit.pdf
    • https://hostingalani.com/calisma2/files/uploads/finobenu.pdf
    • https://bushregenerators.info/userfiles/files/37704028450.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/d64ce2d52be1fea39947efe0cf3b087c/neruzukudovakam.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c9384c28248---zowipolazotagidemalo.pdf
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pexuzesab.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16070d98ab2efc---tesibetusepijimowujo.pdf
    • http://redigonda.it/userfiles/files/40921187804.pdf
    • http://lube-stc.com/ckfinder/userfiles/files/47694262079.pdf
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911f816214a---95811220743.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=powerpoint+found+a+problem+with+content+repair+not+working
    • 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_off0000e9e6.bin
4f41ededa6ae85818357c9d918f2c8fc399d4980ba7620fc89de7394ae9b7bf0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E6 17312 bytes
font_01_sfnt_off00011759.bin
740bb9f64973fc87607bcb25bb92be38715e9edd003b8dea126819a30ff389e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x11759 11320 bytes
font_02_sfnt_off00013161.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13161 16792 bytes