Malicious PDF — malware analysis report

Static analysis result for SHA-256 61eeed49a004d394…

MALICIOUS

PDF

95.9 KB Created: 2021-08-07 06:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 89ae3d376082625e29d2648274cdf80f SHA-1: 244b243ed78faa12f35bbfcc37b9a6da4a27ae05 SHA-256: 61eeed49a004d3949be933fb09389181e75c8053d9bf3da2f047400c34a736a7
204 Risk Score

Malware Insights

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

The sample 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 disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of JavaScript and the nature of the URLs strongly suggest an attempt to exploit users via phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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 http://freehajjandumrah.com/admin/admin/uploadfiles/file/10963927479.pdf
    • http://diplomat2014.ru/ckfinder/userfiles/files/sofajovepoxi.pdf
    • http://www.kowel.com/ckfinder/userfiles/files/1625835845.pdf
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/fa7ee851a545197a5055e3bc9aa9bb89/selumewatef.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16074808f0ce89---wokate.pdf
    • http://ajivikafinance.com/userfiles/file/lobobikasovili.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/5c2872a67d0864e4b436a28e8c4a9ed8/jifomigamanozuzuw.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102a258ef96f---sipire.pdf
    • http://jmk.kr/ckfinder/userfiles/files/39061824302.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca21cca5d---lekabi.pdf
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba4b2299866---728899915.pdf
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a8395b080cd---63221426932.pdf
    • http://charmingcurls.se/upload/file/lizimukipeviraxususi.pdf
    • https://medicentrumnz.eu/medicentrum/files/file/90136149295.pdf
    • http://dzbnf.com/upload/file///rexukorove.pdf
    • http://edgecs.net/documents/73998285555.pdf
    • https://imahima.xyz/js/ckfinder/userfiles/files/ximanivabilalizojajobulo.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1273ddcef---38714503575.pdf
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/jukewobe.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/3682b28bd74217ddb040de6077aa3837/bevezilufedotinaxedex.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/bde46e3ab71dfaab16f445a8c84fdde7/82418141275.pdf
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/32688617938.pdf
    • http://alphasigmaoverseas.com/userfiles/file/gapowemobemode.pdf
    • https://ihotel2b.com/upfiles/editor/files/58141494517.pdf
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/15pp42410o6v39njuqs3l9h22t/zewubari.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=planification+op%C3%A9rationnelle+d%27un+projet+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_off00010d26.bin
101db27fab2b1bfcf8b7788626f48d31bf11eb47e030ba2621dcd88cad23be4b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D26 19148 bytes
font_01_sfnt_off00013d2a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D2A 16792 bytes
font_02_sfnt_off00015541.bin
e2cabdf1fe1b9a1af14bda4d8688172bd1f28925685e5504ff8fb50f5f43de5d
pdf-font-stream PDF embedded font (sfnt) at offset 0x15541 10864 bytes