Malicious PDF — malware analysis report

Static analysis result for SHA-256 09803b002f3dc6b5…

MALICIOUS

PDF

86.6 KB Created: 2021-08-26 14:18:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7a1aa9b1c9747fcd0b218150628bb8a5 SHA-1: 8308ed59751ba9213fd09c94edf2ac6ad55f614f SHA-256: 09803b002f3dc6b5521d558ce55b606742952ebe640f4ffc9749adb7ed87cb7c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://drafthe.ru/uplcv?utm_term=chemistry+project+class+12+food+adulteration PDF link annotation
    • http://le-bouquet.be/userfiles/files/24035239471.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/5438781606.pdfIn PDF document text
    • https://rajaunited.com/contents//files/93596488771.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/c038263d3ce3e6f0a3ab96b4f749b398/kalul.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/800447535609b87f40ae3f.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d41b9e4fb4---99630893864.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a3917ea990c---sikutirimodawe.pdfIn PDF document text
    • http://eviljoy.com/UserFiles/File/metip.pdfIn PDF document text
    • http://etyekilovarda.hu/userfiles/file/18795517738.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/i2a7o3j90f5nampeidkmb23oid/63104707968.pdfIn PDF document text
    • http://mamsongdamchoi.com/images/chua-phan-loai/files/zonulegexavewila.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/sakewum.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/rimusuxurasivetewizan.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b33429bdddb---zurakufelajipoko.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/zivenoka.pdfIn PDF document text
    • http://xedaphcm.com/luutru/files/digujafutinewikopumiza.pdfIn PDF document text
    • https://numen-wow.com/userfiles/cloud//files/majetonixedof.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/e023c764814f166f7fceaf2dd773235e/16297669531.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/d768c719e2dcc01088c46eef5ff3b5e4/94166657208.pdfIn PDF document text
    • https://avistravel.ro/userfiles/file/31778699069.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/gejopejuroxuxorevu.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/nofojaseri.pdfIn PDF document text
    • https://playerpress.com/ckfinder/userfiles/files/28468920561.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_off0000eb28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB28 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001033f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033F 11432 bytes
SHA-256: ec76926f60dc90d99f085ce91d80df83c3916f32eb853ea65f2c0d95acee4077
font_02_sfnt_off00011e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E25 17084 bytes
SHA-256: e9ad0cdfd0be1ddbecc9b87a74e68d152338babca61585d70b53f2c37410cae4

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