Malicious PDF — malware analysis report

Static analysis result for SHA-256 68914dd55295faa5…

MALICIOUS

PDF

68.0 KB Created: 2021-09-12 13:24:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 88b5b748697c5f3875c6a0d4839789b7 SHA-1: e4f4c4ff0992221bdd7b0fdcf9a55b943a2622ba SHA-256: 68914dd55295faa532d0f9e2b73d9794f03094342c151a4713b6dd5c90fbce2e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, utilizing a screenshot to mask a clickable element that redirects to a malicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent. The numerous embedded URLs, many hosted on compromised CMS platforms, further support the phishing and potential malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://oniceh.ru/uplcv?utm_term=one+day+at+a+time+season+4+full+episodes+free
    • http://espwireless.net/uploads/file/bujazikogozedenunetitoda.pdf
    • https://quangcaowebsitecomvn.xemlaco.com/uploads/files/naxumatoniwiwokeluf.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/5f85qvqnk6ppsftj047pebqbvl/wosekevizimipemesa.pdf
    • http://bc-arman.kz/ckfinder/userfiles/files/denup.pdf
    • http://honyi.tw/ckfinder/userfiles/file/pasewusilabajemikijomezu.pdf
    • http://renovfab-menuiserie.com/userfiles/file/6829963588.pdf
    • http://christopherspubandgrille.com/userfiles/files/9109134001.pdf
    • http://myapartment.de/web/editor/files/97584443700.pdf
    • http://mutitar.com/user_img/files/fakisavulorabizazafip.pdf
    • http://massarentearchitettura.com/userfiles/files/17294923264.pdf
    • http://rc-modeller.se/images/file///xabatupejizesonar.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c12d5c6bcb---10825169385.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/57amolut5j1nds9pg5voucpagm/tetimadesu.pdf
    • https://havadisname.com/upload/ckfinder/files/48157337763.pdf
    • http://knowleangling.co.uk/ckfinder/userfiles/files/podozuwaxomizux.pdf
    • https://equinox-e.com/upload/UserFiles/file/raluwenetobuxifudid.pdf
    • https://franciscojaviermoreno.com/DocsCKeditor/files/kigewubidigejilasakod.pdf
    • http://ozdoby-betonowe21.pl/Upload/file/vinemusilokavalokelabi.pdf
    • http://rebeccaosborne.com/uploads/53400965276.pdf
    • http://myapartment.de/web/editor/files/fasimanakuzigopojaki.pdf
    • http://isdoor.ru/uploads/files/zetomofebafozaso.pdf
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/99615423490.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_off0000aeca.bin
a7d8648406e3983e7e1f709301c3937935d0243b114fec93c4a02d2afbe6d9a9
pdf-font-stream PDF embedded font (sfnt) at offset 0xAECA 10976 bytes
font_01_sfnt_off0000c85a.bin
cd30675b902e5af9173e05b982c6f4e92d7c781bb50b23ca6f96350ad36e1511
pdf-font-stream PDF embedded font (sfnt) at offset 0xC85A 14016 bytes
font_02_sfnt_off0000eaae.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAE 16792 bytes