Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce64e79e10b7339…

MALICIOUS

PDF

79.8 KB Created: 2021-09-14 01:15:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b195a21b755e5b2ebe55d8a7d37c9642 SHA-1: 49bb5e5cd49cc67754ac72e1bb4527b2ae415e4c SHA-256: 7ce64e79e10b7339da2c58613cb8c7da1924ef742162eccb47f668c60e581a37
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm pointing to compromised WordPress sites, likely intended to trick users into downloading malware. Embedded JavaScript was also detected, suggesting potential for further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/5d9500d8df12ea93a8c17e8e13e23af6/vatazoxas.pdf
    • https://superpackeg.com/userfiles/file/60418664741.pdf
    • http://bhartiyambeohari.in/userfiles/file/27750188532.pdf
    • http://labsshop.com/d/files/wofowedipimafelibe.pdf
    • http://akademibt.com/resimler/files/30358777477.pdf
    • http://servis-hradec.cz/files/file/fironuga.pdf
    • http://secohthailand.com/file_media/file_image/file/tofewowegojukafuwisebet.pdf
    • http://jjinline.org/file_upload/file/55814542384.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/161358cf91d55f---89104667676.pdf
    • http://condominiobrisasdelnorte.com/userfiles/file/466605721.pdf
    • http://nationalcoopadvisors.com/userfiles/files/punekoderuxosojako.pdf
    • http://galenbio.com/images/upload/file/towujinusavokavinonik.pdf
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3d2f5a4f2---liluw.pdf
    • http://schoonhovensvrouwenkoor.nl/ckfinder/userfiles/files/16800791216.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed836eaa5a---xivaja.pdf
    • http://twtipa.com/upfile/files/2021/09/01/gugaduzegi.pdf
    • https://santevita-bg.com/ckfinder/userfiles/files/nuwujekumakezajap.pdf
    • https://organicearthfiji.com/documents/file/terabutasup.pdf
    • http://k-ookuma.com/js/upload/files/39903862835.pdf
    • http://fruitvita.com/files/files/seneziwagamapakup.pdf
    • http://reyazahmad.bscsaoner.in/ckfinder/userfiles/files/62005876450.pdf
    • https://mkycc4.com/kycc4.com/userfiles/files/65704328276.pdf
    • https://dutchfansitenetwork.nl/ckfinder/userfiles/files/80919084407.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138a428b0798---92378603853.pdf
    • http://www.chp.pl/ckfinder/userfiles/files/gafovuliwer.pdf
    • http://snailgame.ru/upload/files/20210903080250.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=app+lock+fast+download
    • 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_off0000d5b1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5B1 16792 bytes
font_01_sfnt_off0000edc8.bin
276d4c59e83a30513fa06733b9b9e071ac1a7983c347a04fc03f8580837e3692
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC8 10448 bytes
font_02_sfnt_off000105c0.bin
2954daca02a7989b7cbca4046603a985fec63464a07499d4addd6ceec7f9c2fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x105C0 17084 bytes