Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4c19f600e2d914…

MALICIOUS

PDF

84.4 KB Created: 2021-07-04 01:12:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 286ce8f10a0903ada7369eeb2b677bba SHA-1: 857a602d3dc623876417db82c96d2d5e25830a22 SHA-256: 0d4c19f600e2d914518d7da0822b7e8fb9af6f699cf24e5c862669ef2a8c78b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/a4ehv20a6nth7tn51dr9m28dq2/panubos.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/c79c9dd81e07a5c9eae0f9080e2909c5/naguxarobesako.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160861d7aab5e0---jaxomuza.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/87a20405008d5cc8015410b3c48dd2ae/gumiguvaxavaseture.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e315dfe7e---95949836735.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160d3a0537fd8b---79293765660.pdf
    • http://sungsam.net/userData/board/file/55158298840.pdf
    • http://tcurryproperties.com/konadnew/userfiles/file/wakifelaxodubunu.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb0994b4c6---wuxigiterigitutozafu.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a600a49ff53---porafipiduzetolulunisim.pdf
    • http://amirafouad.com/uploaded_files/file/95871285505.pdf
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/1266e8ba360702bfb0f2c611effbdc77/sitirimed.pdf
    • http://clarksville.net/wysiwygfiles/file/xineruzabebokavitovu.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5cf4556aba---6060333049.pdf
    • http://tribo.kz/userfiles/File/nereniki.pdf
    • https://alnahamgroup.com/userfiles/file/sigerar.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609edc999ac91---niximilezunuwiliteso.pdf
    • http://fvv-hohenfelde.de/sites/default/files/files/32202859276.pdf
    • http://orsolyajuhasz.com/ckfinder/userfiles/files/7014450049.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/005527ee0f533354d91eb3d546fca0ce/90896934109.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/2l7skr9luh543i12hsqf09292k/49535248903.pdf
    • http://budoprojekt.eu/obrazy/file/pupidodife.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/0dbfejg8ga4ikma84frf5vrur6/jizewe.pdf
    • http://gt-outillages.fr/ressource/site-image/files/mumiwujajuzonajufikizizu.pdf
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/oevhuj9nf9q6sf60l9eqvgh1q3/99165587607.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=an+echocardiogram+is+used+to+demonstrate+any+abnormal
    • 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_off0000e776.bin
ef8dd20d717de50fe5ab8799cbfd6dd1cbf3fe4fd8fc78c4c9f69766c0200fbe
pdf-font-stream PDF embedded font (sfnt) at offset 0xE776 16488 bytes
font_01_sfnt_off00011237.bin
fcb4416cadd1cff07384a8ab5265469b53082719e1345beaab7e2275006c40c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11237 11152 bytes
font_02_sfnt_off00012bee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEE 16792 bytes