Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ae29ef0c4188f9…

MALICIOUS

PDF

87.2 KB Created: 2021-09-01 16:13:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 52acbac76df2f7033d5cbd7b415f0221 SHA-1: 1bb0fc31df61cae18ec65714ed04c22e1d3d6369 SHA-256: 06ae29ef0c4188f9f03a19a2fa70c460c97af220778d0ad2531bf23decadc98f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or link farms, suggesting it's designed to redirect users to malicious content or download further payloads. The presence of embedded JavaScript (T1059.007) and the likely delivery method via email attachment (T1566.001) are key indicators of its attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://medvor.ru/uplcv?utm_term=partial+differentiation+examples PDF link annotation
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/215cc3bceabf1e6abd264291e20f61f8/sukalobixaduvutev.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/6261287478.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/a399c4ea4ba645a37a7f9e0d26b5f943/4034220941.pdfIn PDF document text
    • http://xn--9w3b270a7kf.kr/ckfinder/userfiles/files/jimewikuwu.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/jk48cv8bqn9g6sicike37peb36/tuzudipexadivifa.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ec6bc769e4---35133282560.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/74406086890.pdfIn PDF document text
    • http://finara-v.com/file_media/file_image/file/68272298444.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1610a17ed07b18---33293611929.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/bupiguzoxa.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097e9bddcd60---nidivubib.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/6c7d6a7cf9d44751e28118c597e7b529/78020863717.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0a740a71a---4850832430.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/38018543393.pdfIn PDF document text
    • https://www.alitec.es/js/ckfinder/userfiles/files/sadisusevojugusilub.pdfIn PDF document text
    • https://itacademyindia.com/ckfinder/userfiles/files/samixukabu.pdfIn PDF document text
    • https://zoomkish.com/basefile/zoomkishcom/files/neduwulokizaz.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/lajuponilarenikezagafuli.pdfIn PDF document text
    • https://geneticapanama.com/userfiles/file/galabelakezonem.pdfIn PDF document text
    • https://nakatarikaszel.pl/app/webroot/userfiles/file/gewonepexawasozegaduwi.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/pezudaritemaxevuwanivoza.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/89960941440.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/kewuzifalikowivomun.pdfIn PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/pikojawogaparuwo.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f299cfc44---dududirofebaxavujedo.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/piganiregon.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ead1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E3 18912 bytes
SHA-256: 004d81afc5dac65e4f5f1a9e5e3f6948702a43af809962471e05b894c5a50a73
font_02_sfnt_off00013467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13467 10760 bytes
SHA-256: 81fe5ef3889c169f784cd095350b531db9e8693a86985adeafdddbf4239d49d7

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