Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ae8c0ab3e8a7fb1…

MALICIOUS

PDF

82.2 KB Created: 2021-09-05 10:55:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8cb5a80c5544a3c0e25ff8417ba56513 SHA-1: 669fb1dcddf9de42c2354eca04202092e3a079cf SHA-256: 6ae8c0ab3e8a7fb1de16c171cec0589c6f1f1fa7ae2e1baeb1db5d8edf5324e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS platforms or disposable hosting. The primary purpose appears to be directing users to potentially malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=english+vocabulary+pdf+with+marathi+meaning
    • http://childconnect.com/swi/fckfiles//file/12125828467.pdf
    • http://teplospectr.ru/images/files/daxevibupo.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/p1egkgm3ccnkq6kmcrpb6roshk/73828369436.pdf
    • http://www.morrisjones.co.uk/EditorImages/file/72484299505.pdf
    • https://sanvexe.vn/webroot/img/files/40415056356.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3c577fa36---15142498260.pdf
    • https://piataafacerilor.ro/app/webroot/files/userfiles/files/savarivesazuvuradik.pdf
    • https://mzlpro.com/web/img/podborky/files/40044754819.pdf
    • https://qfuse.it/images/uploaded_files/ckfinder/files/1629658915_75d62c9284.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/7a7b42esd62iflv7jkc34titoe/mexalipuvadi.pdf
    • https://motiwalainstitutes.org/userfiles/file/76234987184.pdf
    • https://salvatoredivilio.it/userfiles/file/59678725117.pdf
    • https://mytopics.it/uploads/file/76043982623.pdf
    • https://rusepress.com/uploads/wysiwyg/files/98560408935.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/86ad7405e815b62c781d25a502ccc6db/jajagano.pdf
    • http://movitecnic.fr/ressource/site-image/files/rekelikobi.pdf
    • http://hnspkjx.com/d/files/zizoxopizerizeradejidiwu.pdf
    • https://parkettworld.com/upload/files/1975521261.pdf
    • http://efuegypt.org/userfiles/file/86579048111.pdf
    • http://blbr365.com/userfiles/file/1622802007.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6b5b96b5e---gazovoname.pdf
    • https://bostoncake888.com/UserFiles/files/682549415.pdf
    • http://firanywiktoria.pl/uploads/editor/file/defusatedezudubogupazow.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2937968bb7---16880935834.pdf
    • http://zae.me/datafiles/file/52439576941.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_off0000d73e.bin
df9504aa90276a8906b76223ff1a8f1e021e62eb9b8890f59870f8603f85e9d8
pdf-font-stream PDF embedded font (sfnt) at offset 0xD73E 18636 bytes
font_01_sfnt_off000107ef.bin
a4ddb09a753cc01a9370624901e996d580cfc7a48b662b90ee24035668e91f55
pdf-font-stream PDF embedded font (sfnt) at offset 0x107EF 11556 bytes
font_02_sfnt_off000122d4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x122D4 16792 bytes