Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e6716e45822f923…

MALICIOUS

PDF

115.3 KB Created: 2021-06-27 22:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7154c9ec0a462dcfa6f39a0fd337fffe SHA-1: df81143f3fb2b4b247d96d9ed1868beb670f358a SHA-256: 1e6716e45822f923b90f0a13bb3ec4fc35bc22e012b3c5c02dab15b48ab31475
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is a phishing or trojan delivery mechanism. It functions as a link farm, directing users to multiple compromised WordPress sites hosting further malicious PDF files. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirm its role in distributing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9856

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://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/dedfe4820dbaab69fbb7f00c15194bac/tomakipoda.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/d4a826042482a699fa0306f0ea9a4ea0/lavebofojebabudalubud.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/0931arfqhseabai3lcn59o9sh6/memifowagig.pdf
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/t8qmruthj3rqhavuk7uddq2v2b/fulisajiben.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ecd421fa7---resowafen.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/64ufiph6u209cqcj12gsi4i8cu/julumonosedaxonudul.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/67cd4276d8b3d9d6b0ab272df1e8437e/texovojilugabuteju.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/b4eb4c1a43e9547a7adfe8a65fb36998/68202172645.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eea884eedc---22631349921.pdf
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/lv5n3p0iadvu1hn2d1g9iilmm3/xudafepunawifadujobiwige.pdf
    • http://bazis-expertiza.ru/ckfinder/core/connector/php/files/19191477222.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bee585e3779---kifoxikusotasi.pdf
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608c6ff312768---27195701752.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1abca5680---27430002882.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/77e3u1vd0emd066rpemoohl3db/bemugabakonunitewipezi.pdf
    • http://dgjst.com/upfile/file/21443817643.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdbb479465---pigipirilifewefu.pdf
    • http://usaoxin.com/userfiles/2021-5/file/1450850706.pdf
    • http://dejede.com/userfiles/file/wojutukirawuxozalafazox.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/4d539d8cb2e074a9835e35b8e9e1e821/17012932084.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0a6c10705---pebuba.pdf
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/0368839e1d53c77dcde70ea8e1e04d90/5090880401.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/ad9cd28475c0fbc411b4ea9caec20248/73651778177.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=tender+evaluation+report+template
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d83.bin
67f9831a209bd89e447fcf149b6db66c56387039433e94eee9ac426085dc51dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D83 2388 bytes
font_01_sfnt_off000127e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127E6 16792 bytes
font_02_sfnt_off00013ffd.bin
da04595c32e2b8650a0aaa36794da20f9dffdba68845f9ecc877bbc28dfcf4ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13FFD 10516 bytes
font_03_sfnt_off000157d7.bin
b0df7b1631124e0f7765ce50ed96d1e8b8b4f62b0324d455626635aa30540fc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x157D7 27612 bytes
font_04_sfnt_off00019ea4.bin
373c43e3ec9824b00c9d8c9cdea2b8dc7870001ffd2c4eb4f46fcf1cafc97224		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19EA4 18344 bytes

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