Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead26c7f0926b95c…

MALICIOUS

PDF

68.3 KB Created: 2021-09-09 23:45:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 96d99bb492e7eb01569acb1d70f8d624 SHA-1: 2c3fcd491fa7066887c6a48299b1308a287d87f9 SHA-256: ead26c7f0926b95cd09219fdee2717f159e596a13444dbcc73294ec24944818a
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous external URIs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting an attempt to distribute malicious content or phish for credentials. The PDF_IMAGE_LURE heuristic indicates a full-page screenshot designed to hide a clickable element leading to an attacker-controlled URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 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.
  • 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://pixomot.ru/uplcv?utm_term=top+follow+apk+unlimited+coins PDF link annotation
    • http://bartuceviri.com/userfiles/file/42386523412.pdfIn PDF document text
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/54072023908.pdfIn PDF document text
    • http://motovelo-nmsk.ru/userfiles/file/buzakebag.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/luxobepivawaz.pdfIn PDF document text
    • https://gitteszoneklinik.dk/ckfinder/userfiles/files/42650475676.pdfIn PDF document text
    • https://rajaunited.com/contents/files/65949525364.pdfIn PDF document text
    • https://safetypadlocks.eu/eurostyl/photos/file/94521260647.pdfIn PDF document text
    • https://bahamianbrewery.com/ckfinder/userfiles/files/jujuzugoleditenuramovat.pdfIn PDF document text
    • http://rabotatver.ru/userfiles/admin/6340300795.pdfIn PDF document text
    • http://grafosaleservice.cz/images/fck_editor/file/64585744078.pdfIn PDF document text
    • https://rowadalbyt.com/userfiles/files/zadodulob.pdfIn PDF document text
    • https://mamalight.net/business_school/uploads/file/16708260415.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109082108239585.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/c6f752fc4a09feafa3b7869664998365/gixikiligidazotirosa.pdfIn PDF document text
    • https://blogsma.com/files/suferitawokogel.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/8487335832.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/rigowopijexudujis.pdfIn PDF document text
    • https://certifiedcollisionrepair.com/home/cert/public_html/ckfinder/userfiles/files/74082993586.pdfIn PDF document text
    • http://safiorida.dk/operatori/userfiles/file/43534376553.pdfIn PDF document text
    • http://montpellier-business-plan.eu/mbp/upload/images/images/upload/ckfinder/tovekejunafejuzubotuw.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210908232819.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138cc43e2be0---46540800566.pdfIn PDF document text
    • https://jjpremiers.com/files/84010786623.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_off0000aef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF3 14236 bytes
SHA-256: 23c25619a0e6b7e4f8628216720e298cc76adc23cceaba144ad25a3371a07f8d
font_01_sfnt_off0000d25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA73 10920 bytes
SHA-256: 85cc87c622225a4d1548fe143907a736fb0d59ce85aadfde6fd9713f7e8b3be7