Malicious PDF — malware analysis report

Static analysis result for SHA-256 180a31024c16c7f6…

MALICIOUS

PDF

85.6 KB Created: 2021-06-29 06:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e86c90b97d31245a3ca1dadac1c261e2 SHA-1: 5320211567987da3d6bb43cf623205c78a3b13f0 SHA-256: 180a31024c16c7f68941dae3d791c4ac7e70a71cb00444bada8d2df804ca5dba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which point to PDF files hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the link farm structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://drafthe.ru/uplcv?utm_term=social+work+questions+and+answers
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/c2454d4892b6abb10074586475370d7e/zusodejipulekajej.pdf
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/0cb32ff2310e266d74cddcd33e4b3da5/15703231779.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aece72caa9---zivulopizifelagotanex.pdf
    • http://am-assets.com/aom/magnolia/userfiles/file/9785139110.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a367d04d4d4---82679873481.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d06a0f600ca---xumaxitikeluzemodoz.pdf
    • http://elijasprojekts.lv/files/file/pejiripakowawufop.pdf
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/9dc5c5372259f96b5b86a42e85897325/75250825180.pdf
    • http://cc-loges.com/uploads/file/femuzijidojokukela.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abbd673613b---wivorarasitolawaxenivigo.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160b8aed97982d---siwusaledejapetafa.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090d0c0d29b6---69736968860.pdf
    • http://obasekiestates.com/UserFiles/file/darawanadedisuk.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/o1efbliplrf5916dm3uv42mcr6/64457666862.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d23d485b64c---ripipumuvewenegezu.pdf
    • https://alakharia.com/public_html/userfiles/file/rubatov.pdf
    • https://parklanehotel.asia/userfiles/file/wonemonagetovomiposeloma.pdf
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/958607bfadf1a0126ed9a3291744050a/81357452798.pdf
    • http://strategie-online.net/catalogue_dynamique/file/41436590697.pdf
    • http://winfielddeli.com/ckfinder/userfiles/files/resilepadit.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/mndctmi0pa8ph4p9i7mtpk1gro/doserasenelosozefusamerek.pdf
    • http://myjobcareer.net/userfiles/file/2021062716021373499.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/85fa0bd147e50ab8e475c921d302a321/foxabopisozidoke.pdf
    • 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_off0000ee7a.bin
129f9bd0d58af0a84fa1ff4a3d169a92751cf4b62906b1cb9a2ca098f8a972a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7A 10864 bytes
font_01_sfnt_off00010787.bin
b344b4d50d2e18b4c9e7b7a95ff186313b1874dabbe9697107c658979f310408
pdf-font-stream PDF embedded font (sfnt) at offset 0x10787 16124 bytes
font_02_sfnt_off0001310e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1310E 16792 bytes