Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f58a665b0fc6b0e…

MALICIOUS

PDF

83.5 KB Created: 2021-09-02 11:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8915e342851552d535fd61142b804fe5 SHA-1: 69c407f190ed2d2d68945c566f900e079c7545d9 SHA-256: 9f58a665b0fc6b0e645bebfdd5c23ba47c8297c3ea75bcc5438e9b7becbfe3fe
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. These links likely lead to phishing sites or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • 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
  • 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.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2876f2f61---30896149987.pdf In PDF document text
    • http://ch-bovi.com/upload/files/kugeduwugemak.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/savefepekakepulavuw.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f722bdf47e---sopipilidirifukejovetuvu.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fc300f03b---gonudi.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/3874ebdd3e1dae6bc2a61dfe7b80f4fd/lekalavo.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/88672793274.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210621151727.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b95fb431327---57037628241.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738429f1164---janux.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cea069e71---43844423941.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd070df86a---pizifivin.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/bupixefivewubifawe.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/28873487361.pdfIn PDF document text
    • https://bodzlomu.com/userfiles/file/35705218711.pdfIn PDF document text
    • http://xn--80aaaghhaztbcd1agjgbccsgfftf.xn--p1ai/pict/file/64173568289.pdfIn PDF document text
    • https://actor-conseil.com/files/file/91535081975.pdfIn PDF document text
    • http://zhatuogz.com/uploadfile/file/siranumuxusafinidoj.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/39154873666.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/32324954279.pdfIn PDF document text
    • https://principesgs.com/userfiles/file/93201835908.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///74322171865.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/cb7b38bf747c562ebb777c2d609a6f6e/savuwafafisedet.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a758543ed0e---lojitugavugubar.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b828f8487bb---memotukogabaw.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/m197nqmiq6gdfc1rv928oegpl6/92970054001.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=print+multiple+pdf+on+one+page+macPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000e297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE297 17096 bytes
SHA-256: 91099bdf28f1be1e56a737cd1d0977fafc211d35fc84127bad408536cbfdab53
font_01_sfnt_off00010efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFC 10896 bytes
SHA-256: 8b7a584bf0efc4c65589d7064e502d6202543aa56dd8bc1d3f3091222fd71908
font_02_sfnt_off000127eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1