Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c0669bd04861cbb…

MALICIOUS

PDF

94.5 KB Created: 2021-09-06 13:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c92eb052b1349be11888248156f53075 SHA-1: 62ce2ce641337b75592cc08e17b5324e09786270 SHA-256: 9c0669bd04861cbbf4f1abaf8f025715380165615588463905782c3cfe461d72
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites, disguised as download links for 'nana manga pdf download'. The presence of multiple PDF link farm heuristics and a high ML classifier score indicate malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns suggest this PDF is designed to redirect users to malicious content or download further malware, likely through embedded JavaScript or exploit chains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/1719a266fa44db061b7826dd27b3cfde/96313343740.pdf In PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7e23860d0---vafoderimupavibefowoza.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/8534152196.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/51259128217.pdfIn PDF document text
    • https://panama4d.com/contents//files/mivezulolabijo.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/be154383a75273997b169ada826f1417/6603371216.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611b150c97f4a---23260330961.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/30564186480.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/73419257876.pdfIn PDF document text
    • http://asfalon.com/__files/file/47930154551.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160b89ce26f997---80219369766.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/gawisojudodilefu.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c51811b8d50---58939280398.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/jefivefajudupikubefukome.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16134af3367850---lalogovafobalilasadetet.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/91737185372.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/ttrmnsmegthiv2suletosopn21/17595022160.pdfIn PDF document text
    • http://idealhca.com/admin/images/file/84745530961.pdfIn PDF document text
    • http://nakatka.com/files/file/darubafu.pdfIn PDF document text
    • https://uclerbaklava.com/resources/file/gibuk.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/nonobo.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607db21d6af7f---18738034879.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca04538409---bonana.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/af0ee250302314eca2d62e2bf6f666fd/nixugobusekixivejeweki.pdfIn PDF document text
    • http://deauville.ru/files/file/ruruvuzozidodisutarepo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=nana+manga+pdf+downloadPDF link annotation
    • 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_off0000ff7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7E 24132 bytes
SHA-256: bf62927c35fa226221db0a094d11b187257b2a91dc515bc266af2098c8247c63
font_01_sfnt_off00013d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001553b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1553B 10312 bytes
SHA-256: 15bfd7595bb92445e07f9650d63c02afe8cf2fd29b88b63a0b321ad454bc94e0