Malicious PDF — malware analysis report

Static analysis result for SHA-256 44e65724b8101595…

MALICIOUS

PDF

68.2 KB Created: 2021-09-27 05:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 025c07f8a2004083a22ae44a33ac763f SHA-1: 2548cfaa791de6fb183100f01dfdba9948cebde2 SHA-256: 44e65724b81015953b0ed6d395df0d7be29c59147acd7a23468a998dd02c1f2e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains minimal text and relies on an image to obscure clickable links, a common tactic to trick users into visiting malicious sites. The numerous embedded URLs point to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://krisoc.ru/uplcv?utm_term=why+do+videos+from+iphone+to+android+look+bad PDF link annotation
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/5ku75j3e8h5pt6dmvv5r3no5p2/gatazobedadavagiketika.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613391e5b4bf6---kazasemu.pdfIn PDF document text
    • http://veiligheidsslot.nl/ckfinder/userfiles/files/nebanabuwabixokawise.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/66889368687.pdfIn PDF document text
    • http://parzenica-bialka.pl/userfiles/files/piviwuvajiwavadukuzexoj.pdfIn PDF document text
    • https://repetitorebi.ge/userfiles/files/96384993663.pdfIn PDF document text
    • http://vandientuchinhhang.com/upload/files/demazemazuwewi.pdfIn PDF document text
    • http://pixel-pro.ru/upload/file/71961811303.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c6a2c5925f---33258565264.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/genusotajikelug.pdfIn PDF document text
    • https://hojoairport.com/images/file/29835915804.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/5bda31e5f077da17081da0ec6c8f638f/duvawedekijob.pdfIn PDF document text
    • https://valuekare.com/ckfinder/userfiles/files/welabupevenada.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/vopex.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614032f3dbd40---87949079717.pdfIn PDF document text
    • http://phanmemerp.vn/attachment/files/81540216724.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/23405873058.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/wagigagasi.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210913_588DABB891A66079.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_off0000ad65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC57C 11168 bytes
SHA-256: dc968188d333a57c75c5b4235c747fe73655b1f17c3917a5713bf179d8794c8d
font_02_sfnt_off0000df34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF34 14288 bytes
SHA-256: 0369d60e6b49b7e069cfbd8d17730caf5c0e212856ebec9a0ddcad9c36a2cbcd

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