Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ee3d4c5a8d5c24…

MALICIOUS

PDF

94.5 KB Created: 2021-07-06 01:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5638ef6059acb29bf163214f4bad91b9 SHA-1: cdcde1e351de524272e19206ee923226ad9897ce SHA-256: 11ee3d4c5a8d5c245c113ba7b3e8fe63afc0e3bb688dfc170f1f19bd35fd18f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous URLs, many of which are hosted on compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests a phishing lure or a redirector to malicious content.

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 http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c565a61b113---pufamizi.pdf
    • http://airsoft1.ro/files/file/77377654995.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/c8f64e688d61c188b6377697f9cc38f6/78871405962.pdf
    • http://apluskleaning.com/admin/images/file/46986760527.pdf
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/7a6123c432a69bf22d67008d31f16b7b/bifififewes.pdf
    • http://driver-jazda.pl/upload/file/65275635613.pdf
    • http://biomassasia.net/data_ed/userfiles/file/kuvinogekanibewojigax.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/4001a9e72a4de19d753ffea0de115a7e/7639492329.pdf
    • http://studioagm.it/userfiles/files/71036406021.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac860a852c6---92374624991.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608201951610e---pilesaxozam.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa3ce49d0b---wenotubusutewalin.pdf
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/1dd9babc44fd86791f3272ea234c01e9/37704725213.pdf
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1b9e2f2b9---wapavojudupuseniwo.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/6ca0b7942f3d49411bd2e75505564229/gofife.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/4bd6baf264c48dfbee842466ed62e522/5957532098.pdf
    • https://apsco.ly/userfiles/files/58511658112.pdf
    • https://efficimm.fr/userfiles/files/lugezigikituzadone.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbfbcfb1898---tubifurijat.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082ddf106f94---78977789631.pdf
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16091ac4e67f81---41744219370.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883c6b0064f---36789957890.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160d47db2453ee---keloxopazo.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/77c43d206164a4f882dd4f6756efd44e/29727896415.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbaaac196f---lizojesixunagedujapi.pdf
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/160903b07f2540---wisatunasamezajonogut.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+can+you+become+a+vampire
    • 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_off00010ddb.bin
ec64fc141287a6f5819b7c652f230309b20320e4feb91a3cc4cbeadff412201e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDB 17236 bytes
font_01_sfnt_off00013a9a.bin
2d5f7c29716aa8ded8e51f5cbba282efb44fcb72dea6fb3be4932b59b82828a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A9A 10720 bytes
font_02_sfnt_off000152fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x152FA 16792 bytes