Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5514d1da47bf661…

MALICIOUS

PDF

207.7 KB Created: 2021-07-14 09:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a654960d7a7dbc8675d83b69f94063f2 SHA-1: 2574e38a44148f984a7f5551fc9d4cb43c8e1594 SHA-256: c5514d1da47bf661ff13480d847f00621803c81dca7682f28a9f4fa5fe260f19
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious intent, including external URIs pointing to compromised WordPress sites and a direct IP address link. The ML classifier and ClamAV detection strongly suggest this is a phishing or trojan PDF. While no scripts were explicitly extracted, the nature of the links and the 'compromised CMS upload link farm' heuristic suggest a phishing lure designed to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9703

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://chcial.ru/uplcv?utm_term=sadness+and+sorrow+guitar+fingerstyle+tabs
    • https://clickkedai.com/userfiles/file/mexofowodurase.pdf
    • https://techson-cctv.com/upload/file/50016056302.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f26787e2c---fozaroremejavarevat.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aae254be615---20688507092.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16083db9a76ea3---pinemivi.pdf
    • http://championsview.net/userimages/vopaxumozenukofosovexuja.pdf
    • http://www.tobywells.org/media/fckdir/file/82890992908.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/99a924cbfaa58e3bc4e7501aa6202164/xuwabi.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/5df8cbdb71b1e03dbeb4e8e808671050/11349987452.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/57f5b518d16ccf7d3a0480043e5648ee/narux.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad28347821---65952130313.pdf
    • http://thsport.dk/ckfinder/userfiles/files/videfekobiri.pdf
    • http://veoguidecostarica.com/ci/userfiles/files/74103860952.pdf
    • http://scoutpate.com/userfiles/file/64772194174.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160762e06c7d0c---kizawokuvotiwu.pdf
    • http://ledseoul.com/userData/board/file/78062061792.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16073175a300ee---jitewokizapinaga.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d52057b7037---wedugugakutorewukenajude.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb8fc42ade---zitewoliruwumumukovexozu.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/obituaevjsoatbe9oac28lh9v4/gikujavuweligomaz.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160893cf9bb2cd---12376766064.pdf
    • http://chonburi33.com/userfiles/file/wogudujorilojunovazunanix.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/5d49022c269edecb6284842c01e2dae9/77999884257.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/3f4f161a005b4e954c1034717303019c/tukezeripare.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_off0002ccbb.bin
a8eb953c80dc8aea1802c709f989be94506ed6afe55c417cfc182b1ab4e4ac77
pdf-font-stream PDF embedded font (sfnt) at offset 0x2CCBB 19184 bytes
font_01_sfnt_off0002fd9c.bin
21aee3df27f35a778c6d7eda565c30ff6dd665e2e2b5338bcde7eaf607ac27ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD9C 11044 bytes
font_02_sfnt_off00031749.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x31749 16792 bytes