Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e1c869ba18fd00…

MALICIOUS

PDF

77.7 KB Created: 2021-06-29 00:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 844e719741bd6a573175f7e15b939ad2 SHA-1: 5763951b5df38406f09b19dedb072c822fac73bf SHA-256: 07e1c869ba18fd00bcbfddc2c5618612da72414a3d93dca14248f79d36d5d12d
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The presence of a link farm on compromised CMS uploads and disposable hosting suggests an attempt to obscure the final malicious destination. No scripts were extracted, but the structure and heuristics point towards exploitation or redirection to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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 http://debden.org/userfiles/file/fimipogunigosof.pdf
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/c6ee02530c568268bbabea15a6c4b3f6/57306659702.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160988e40a912b---9952112411.pdf
    • http://krevue.cz/UserFiles/File/zugiwosudu.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/9139d93849ab11eeb51d8d33b91ec09f/60067893492.pdf
    • https://autoandtruckrepair.net/nbloom/fckuploads/file/nidojadosokudodubakapos.pdf
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/bfb0c1568977df32ee24f1c2239669d7/70901271346.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/3017aae5f025faccb8ddc0dfc641a320/temul.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9def06fe7d---15479626667.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608780a173397---gajefoxanajupimuliluk.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160917897bad58---97652127815.pdf
    • http://ritadas.in/userfiles/file/32490107166.pdf
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/53663659539.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/l4m7bt05oltj93k5np8t1gn3p7/88364168005.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d81476658---95721761875.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/8a873100fa04de7b0af56d38fdab7197/46293767479.pdf
    • https://miguktour.com/FileData/ckfinder/files/20210604_36B8DF469C106473.pdf
    • http://berbun.com/user_img/file/33569409658.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f863fb8ce5---90050182903.pdf
    • http://myexamadvisor.com/fck_uploads/files/11790951770.pdf
    • http://vankouwenenmastop.nl/UserFiles/file/64285768778.pdf
    • https://wineart.online/userfiles/file/69531841307.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=microwave+blueberry+cobbler
    • 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_off0000cf60.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCF60 16792 bytes
font_01_sfnt_off0000e772.bin
40eec5a248179b63af18d6c78aeca4d5bee8f4bb0428d9351684d8f40dbcdb1a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE772 16556 bytes
font_02_sfnt_off0001124d.bin
40a7aad6890c6455b653daf80d0d84fa3fd7c5a88b32d5475640b67338d3973d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1124D 10352 bytes