Malicious PDF — malware analysis report

Static analysis result for SHA-256 2741f7ebac2720ba…

MALICIOUS

PDF

81.6 KB Created: 2021-09-09 23:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6860b8e046f80b23318cd579cef6105c SHA-1: f45f555a8647466a27bc81a2899488fbe56253b6 SHA-256: 2741f7ebac2720ba23786c57b7618b02e0577a0835779fcad20fc69564baec23
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, a common tactic for distributing malware or phishing lures. The presence of external URIs and the nature of the heuristics suggest this PDF is designed to redirect users to potentially harmful content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/e67a85db00bd91a653c277d8ddd5e1e1/29927772500.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/161318d1055610---toparirasasobiv.pdf
    • http://bernardthevenet.fr/ckfinder/userfiles/files/38596097977.pdf
    • http://abaj.cz/UserFiles/File/73465479850.pdf
    • https://10playsolutions.com/clients/softklk/documents/_articles_/file/votedutupukelepexojivuzak.pdf
    • https://rowadalbyt.com/userfiles/files/69231117966.pdf
    • https://lensmam.com/userfiles/file/19583721248.pdf
    • https://www.corpeverest.com/ckfinder/userfiles/files/burukapaxulafa.pdf
    • http://jingkangchem.com/upload/files/65957453882.pdf
    • https://kitchensofdiablo.com/upload/file/wofigani.pdf
    • http://eastwoodfamily.net/userimages/nigabemaruvefibasadek.pdf
    • http://kredoteka.ru/uploads/file/68037479644.pdf
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/1402ee4db07bc2825f03f488d554e698/98620032538.pdf
    • https://verredistri.fr/xmedia/file/robubigefuvopovaka.pdf
    • http://thaimassagemodel.com/ckfinder/userfiles/files/suzerol.pdf
    • https://pass-eco-energies.com/ckfinder/userfiles/files/lobosijaxabexavowu.pdf
    • http://glttek.com/userfiles/file/72803303191.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/8b1b10f56cf547cf6a87d08f252d17b0/metomarowu.pdf
    • https://italvaping.com/file/48990664570.pdf
    • http://gaytonfa.com/upload/files/titadi.pdf
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/36e4bbc3a4c33675391865d72b357890/nariro.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613803c82c8e4---bukokugafifogisonefix.pdf
    • https://stl-log.com/htdocs/cljr/data/files/65067080081.pdf
    • http://vncdata.net/app/webroot/uploads/files/19651524193.pdf
    • http://suspensionestg.mx/userfiles/file/68343397390.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613106dcddac3---gexomekimikasipasefuv.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=how+to+find+apps+installed+on+android
    • 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_off0000daba.bin
6be5ecc0117cccac4e6398f7967a189aa5e873f38cef286c6ae7da86a4c2b5fe
pdf-font-stream PDF embedded font (sfnt) at offset 0xDABA 17716 bytes
font_01_sfnt_off0001081a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1081A 16792 bytes
font_02_sfnt_off00012031.bin
0daf0ae46fada3d13c325bafdeb03bac56142e8b03b0cbef6e4a0ab626b0181d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12031 10568 bytes