Malicious PDF — malware analysis report

Static analysis result for SHA-256 206162647c543786…

MALICIOUS

PDF

90.9 KB Created: 2021-09-17 11:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a4034499dacdc0ead7b49aa3e491356d SHA-1: 6167ab3006c6204351733d842baa5b923fd160eb SHA-256: 206162647c543786bbf685e0a8674e8f62bd4e5653d62e66ce01aa04f8d09e4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on disposable domains or compromised CMS upload storage, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://sake2metustin.com/uploads/files/20366056227.pdf
    • https://movimientofamiliadejesus.com/images/uploaded/file/56715371326.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138138ee7906---lazow.pdf
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/20729473724.pdf
    • http://oldstat.ww.tj/img/file/72306634188.pdf
    • http://markone-tools.com/upload/files/vomafi.pdf
    • http://nriloan.jctoursandtravels.in/files/66004601741.pdf
    • http://caogenzhiben.com/filespath/files/20210915205112.pdf
    • http://1-sanya.com/blog_images/blog_/file/minad.pdf
    • https://finliz.lt/i/File/90834735312.pdf
    • http://dogomanhnghia.com/uploads/files/zukovabumuwivakavulomevug.pdf
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/59273295387.pdf
    • http://giasuthienphuc.com/Images_upload/files/92994544175.pdf
    • http://design-klasse.de/ckfinder/userfiles/files/21858361226.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/8e4d34d22eb3449545e57afa0dd268ca/51556388408.pdf
    • https://www.studioline.ie/ckfinder/userfiles/files/jasadexifafeweje.pdf
    • http://ibrahimalsada.com/pics/file/50417487300.pdf
    • http://citygclub.com/ckupload/files/43548566185.pdf
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161437a69bf595---rarisawotunebib.pdf
    • http://www.afurg.com.br/assets/ckfinder/userfiles/files/82527023285.pdf
    • https://www.allduniv.ac.in/ckfinder/userfiles/files/xupukifovudivipiva.pdf
    • https://shirbandifelt.com/userfiles/file/kajifawulekojugenib.pdf
    • https://rsebolivia.org/userfiles/file/galewidilup.pdf
    • http://jiangsutravel.kr/userfiles/files/20210907_165202.pdf
    • http://www.ocptecnology.com/admin/uploaded/fck/file/1378977194.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=full+house+123
    • 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_off0000fe5e.bin
365ac2c8c927a2bb481e4f3fc0a875ce4b6abf2a3be55a11aa17b827b6deffba
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5E 18624 bytes
font_01_sfnt_off00012f1e.bin
44cd8b79704f009b645b3c16574e1c1d443ddf6e890dd0b1a6874e5a3adce5f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F1E 10072 bytes
font_02_sfnt_off000145ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x145CE 16792 bytes