Malicious PDF — malware analysis report

Static analysis result for SHA-256 08705dc0b138c693…

MALICIOUS

PDF

102.5 KB Created: 2021-06-28 14:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 09984709d3b314b20a740692b629129b SHA-1: 09847a83d259d2f9148a1afdda46f6059a155704 SHA-256: 08705dc0b138c6937a1cb43dd0a961a53fe14b610e1f50c37ab6f57b9c944c6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of external URIs and link farms on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d00399e52---tefadosujuvekow.pdf
    • http://dokumsuzgec.com/userfiles/files/furadataji.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99e35a16c8---38444718227.pdf
    • http://ufnk.fr/app/webroot/files/file/foliberakifasupofiz.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4a37fdffd5---pojafenadivuvozezi.pdf
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/8151f1072b6cf20ebc5d04da12f5a855/12600751790.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/12b95b91e142eb347f612acab9a121aa/jugulufazamewapukokage.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50924c1405---ferorilikexawezuzosivofu.pdf
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/fc8caf13f3cdc18ac394274dde52812a/15406083461.pdf
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3d997a2a1a---66842023870.pdf
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/lemadija.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608682199fc8b---karalaledabukoxonexanikaz.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a92a08e565c---40798604247.pdf
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/d903dd92031c6082e9383c910e7bb8ad/fetuxal.pdf
    • https://greenvalleykerala.com/ckfinder/userfiles/files/28960028397.pdf
    • http://omonetach.pl/foto/ilustracje/file/15983157605.pdf
    • https://nnkcreations.com/userfiles/file/kiwonu.pdf
    • http://crisismobile.com/ckfinder/userfiles/files/88120507670.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/dvau4su3vkqk69hku6p6r4r7r6/lerojexi.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/c53a10cd3117c3cb43ebe3dfba168d8c/foperez.pdf
    • https://charlesstreetvideo.com/userfiles/file/41335719008.pdf
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/8cd576ffb03720306aa02df7a5b86173/64047066447.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=local+pizza+shops
    • 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_off00012e4a.bin
c48e2ebaafb3c5a4a3b89e64120072800149ba84a77a300f61e9c2c8821e5730
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E4A 18324 bytes
font_01_sfnt_off00015e81.bin
c781f0cb1bd10f2169d127fa934abe0e7b13e27df983f3b6aabc0f47e058ab29
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E81 10056 bytes
font_02_sfnt_off000174fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x174FB 16792 bytes