Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62eb18fee2e14dd…

MALICIOUS

PDF

105.8 KB Created: 2021-07-06 06:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 404b29d7c5a24ef49bad51c937797512 SHA-1: b980614cef4000338edeaadcdedde4a37bee447a SHA-256: c62eb18fee2e14dda47237dcb80b748a925362050d73fc6df7a93c8ab3c4ffba
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded URLs and the nature of the links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5764fb28c0---zijamiboz.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/108f481816ef44fca9a35dfa2259dab8/4671162622.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/0a3de0bc550fc9ff3b0293fb510ee40a/sekizukofuxigedepib.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c29a6bb6ec2---duresedili.pdf
    • http://timebank.ru/sites/default/files/photos/pagefile/96905159817.pdf
    • https://aawyx.com/sites/default/imageuser/file/95539908295.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c5088a1e81b---97441706894.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/7tidc2j3g183pq50qmkou4hdf4/wenatekoledikita.pdf
    • http://gancza.pl/userfiles/file/dorisozawigipepazaz.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fdfa8f9e2---fasexaluga.pdf
    • http://goldenbaycruisesagent.com/userfiles/file/fatuvejelukidisonep.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/7e03cd630374f73fbba6671f02f63560/99260126580.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/4vp94j4d8dp6hq9lfalmv7pgfp/34946592067.pdf
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/vabatubuxodobo.pdf
    • http://www.aluvascientific.com/UserFiles/file/26110303628.pdf
    • http://richmediahouse.com/admin/uploads/file/bisidudaxet.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/078fd9c2a540bfbd2aa6946da8b619e2/48793328682.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/90eu07nuki1t6bk85vi5adoq80/muvawera.pdf
    • http://icmasistemas.com/userfiles/files/zopofubadaji.pdf
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/d310o7eckq7101eed0iv6o36db/42238845743.pdf
    • https://keralatemples.info/ckfinder/userfiles/files/gesuwan.pdf
    • http://maroba-zirndorf.de/file/67402334481.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b595a418c74---kifej.pdf
    • http://pulsarvn.com/media/ftp/file/72558738907.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/cv848didleuotbtesrspllcds5/favuseluw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=citizenship+in+the+nation+worksheet+answers
    • 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_off00013ba8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA8 16792 bytes
font_01_sfnt_off000153bf.bin
8e49dafe6f04b3b5da41796d8a5e41273ef62bc75d1d9b3898ffcc9c0c43ef51
pdf-font-stream PDF embedded font (sfnt) at offset 0x153BF 10572 bytes
font_02_sfnt_off00016bfa.bin
fc51e5dc84335d084c98da7b170884c355effc41b503f8b1795139417b0edbaa
pdf-font-stream PDF embedded font (sfnt) at offset 0x16BFA 17640 bytes