Malicious PDF — malware analysis report

Static analysis result for SHA-256 169baab5524bcb88…

MALICIOUS

PDF

75.7 KB Created: 2021-09-17 15:08:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 54c843a831db76cd2aea9511b313fc84 SHA-1: 3b71838c0503e05ace7658a5b714cd15f4a6a363 SHA-256: 169baab5524bcb88d23a8ccaed846f63f831ac9090eeea327a7ae9cbcfb5b9f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://pixomot.ru/uplcv?utm_term=worms+n64+rom PDF link annotation
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/d6ebdce1158a47611a429111b6510893/joposowipebuligapar.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/17534469234.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/61108583507.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/57057823168.pdfIn PDF document text
    • http://fabrikando.com/cmsimple/images/file/jonewogufa.pdfIn PDF document text
    • http://windowsplusllc.com/ckfinder/userfiles/files/xakar.pdfIn PDF document text
    • http://ferien-in-zahren.de/images/file/xonawatenelozugaridomux.pdfIn PDF document text
    • http://cattaneoarchitetti.it/userfiles/files/37140364760.pdfIn PDF document text
    • http://manhtreminhduc.com/webroot/img/files/rozavizafejexome.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/60207269945.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef7722efc4---sogabopin.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/xivesibubasaretoko.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/44038835099.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/20822178980.pdfIn PDF document text
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/pixenidomatirivuva.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/83694197982.pdfIn PDF document text
    • https://mchs.kz/userfiles/File/lisebubafagakamokukewokaw.pdfIn PDF document text
    • https://emilline.dk/ckfinder/userfiles/files/toluzivogenovodexa.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/28108409969.pdfIn PDF document text
    • https://projektovanje.info/userfiles/file/molebatubazo.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/61405209540.pdfIn PDF document text
    • http://www.mamafoundation.cz/ckfinder/userfiles/files/goromisizagoxidatazatu.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/38977191783.pdfIn PDF document text
    • https://xn--bren-mgenwil-gcbf.ch/sites/default/files/fck-uploads/file/88539418910.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/5872c52d3f0d3b839f7037489c3e2598/52171145437.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_off0000c0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0DE 19816 bytes
SHA-256: 10363cc07d7c45dac2db569dd25f8cfb2717cc4a30daeffb9bbffe3e669097bc
font_01_sfnt_off0000f33f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF33F 9980 bytes
SHA-256: 9e17995390ff96f6ae507d1f50a25e4191915a8df2dba30bf9380f6a1b701e96
font_02_sfnt_off00010958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10958 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.