Malicious PDF — malware analysis report

Static analysis result for SHA-256 f86ee11672ba660c…

MALICIOUS

PDF

87.9 KB Created: 2021-06-30 07:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3d00623ff67e7eb3d90c0a704100add7 SHA-1: 56928f3455fce6821550f0fae76e2c9b71004d42 SHA-256: f86ee11672ba660c057954201ee03b24d4a6bfdae8336ccbb040c570d24ee1a0
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8cbaae132---27233889924.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f4d7a0cf3---74905960756.pdf
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/fa3309a41c0c4f166f72fa15a3fda20a/xalagujezunikebevavomixek.pdf
    • https://argumentua.com/i/file/vikizexerakulo.pdf
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/c1c1f61b72eb06b5481b5d41e6e98391/67935644002.pdf
    • https://studiovizia.com/webroot/img/content/files/84552970443.pdf
    • https://fontaine-eva.fr/userfiles/files/2040420441.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/eukp7bm7rjn1ocqbvu39pdro75/55476915874.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/vl2i18jrhhrdffobc89e0vtrs5/sojagupepuvawid.pdf
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/84d2b05720841fceb23354f2487354b0/50281628043.pdf
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc91cd596c---48670080309.pdf
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/2021615215442774.pdf
    • http://boxethai38.com/upload/file/jilabarajebuses.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a277041d4---pukemivozalum.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c930566fe0c---jinowilufugoxawogofo.pdf
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6404649e2---94157298382.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/f6fc1ecc7212943e1f10d387b7bbcd21/jemezitopitujonuzonega.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/b79e012c0aa5f826c81044811bd9738c/64768766451.pdf
    • https://foundryindia.org/userfiles/file/26848537879.pdf
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a1baa232a9f---moginepubufekewe.pdf
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/e610f91dddef770d4d831de817560c75/rititu.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c5c94e0ec---30779662380.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c59c23537ef---fojazapuniwisipojonivize.pdf
    • http://landmanenterprises.com/clients/6/66/660ad4be7ac834282af30b44844c6003/File/40208277907.pdf
    • http://beiwendq.com//data/attachment/file/27170413547.pdf
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/dexeguvunivokidafivize.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=linebacker+with+one+hand
    • 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_off0000f50e.bin
78a30fab8677a0ad3ecd21d38d72cb129e28c6367fcfacd87d3f947cbe75361e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF50E 17108 bytes
font_01_sfnt_off00012211.bin
caf0fb94f2269ccd473c662099f13ceaf333c5c67fd4354931550e82000d95b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x12211 10528 bytes
font_02_sfnt_off00013a0b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A0B 16792 bytes