Malicious PDF — malware analysis report

Static analysis result for SHA-256 e89179b99e51d8e5…

MALICIOUS

PDF

69.6 KB Created: 2021-09-13 05:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 9d68e433f549f5b7037ac861e4eb882f SHA-1: 21029d65ea0b7ea200aeddc61b134e55f7ccd404 SHA-256: e89179b99e51d8e5d0d0981fa029dde056948ea1e7615c779bc87eb1dd278302
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains embedded JavaScript and is presented as an image-only document with a clickable action, typical of attempts to redirect users to malicious sites. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's a technical artifact rather than user-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 69 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://extremedriveline.com/ckfinder/userfiles/files/19204545704.pdf In PDF document text
    • http://gazetavk.ru/img/file/lotix.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16137e597058ff---xutoridetilamakekiwodil.pdfIn PDF document text
    • https://tumsad.org/img/editor/image/file/zubevanekozixeri.pdfIn PDF document text
    • http://ranchobg.com/img/file/89180558585.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/63133016247.pdfIn PDF document text
    • https://lombardpruszkow.pl/local/userfiles/file/bezulivagusonofukovaze.pdfIn PDF document text
    • http://apicn.net/upload/files/27174739824.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/jirajitatiduj.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613819cd62c0b---fovavimigu.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/15360487598.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/guwivatofe.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/dobakemanivujugelutes.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/kilojelinovixebuwo.pdfIn PDF document text
    • http://www.oteliapelsin.ru/ckfinder/userfiles/files/podusugefofixomatopufi.pdfIn PDF document text
    • https://www.institutvzdelavani.cz/files/pizudezinimaxajekepe.pdfIn PDF document text
    • http://garage-ys.info/js/upload/files/69643524200.pdfIn PDF document text
    • http://solis.altrodesign.eu/ckfinder/userfiles/files/78864246832.pdfIn PDF document text
    • http://ed-union05.ru/files/file/wonefosonavagemuxatufos.pdfIn PDF document text
    • http://dywin.com/uploadfile/files/89126606051.pdfIn PDF document text
    • https://takitech.hu/userfiles/file/87462127610.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/fipitovozisat.pdfIn PDF document text
    • http://naturenhuman.com/app/webroot/userfiles/file/61909111353.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/daranumaserog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=in+pokemon+go+how+to+get+coinsPDF link annotation
    • 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_off0000b568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB568 14224 bytes
SHA-256: ddf870cb2ab0841645ed466dcf5e8c7984acc301a5e8c42673ae5e19f318ef18
font_01_sfnt_off0000d860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD860 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF077 10644 bytes
SHA-256: a1d3930db54eddda460b1dda19559546cb3cf337abb96f6f2028c82a3b811b1d