Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c35d14d72bb2e45…

MALICIOUS

PDF

96.3 KB Created: 2021-07-27 03:55:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a73b0851c4422e7690041373e885ee9 SHA-1: 7b4453ef50e36e6ad17efa53de7849603b633c1b SHA-256: 7c35d14d72bb2e4526e6733ebb971a679b9136c85b88c4a74da9ab232a494e3a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple domains, some of which appear to be compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading a secondary payload. No scripts were extracted, but the presence of numerous external links suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.radio-kum.si/data/files/pujevok.pdf
    • https://avela.md/userfiles/file/544107703.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/3904bec41b9681d37fbc2cf6b6597981/fiwulim.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f862cf42264---pegizif.pdf
    • http://sofia-es.tokyo/yamituki-n/uploads/files/37117942965.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed63f346c4d---wenutib.pdf
    • http://jatyn.cn/upfiles/202105/file/1621234433.pdf
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b09f08d92f3---pezegugef.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b870d137679---72523606711.pdf
    • http://grafichesirio.com/userfiles/files/28216870461.pdf
    • http://caopump.com/admin/userfiles/file/tipaxujunibupixemibixo.pdf
    • http://unsersohn.ch/images/file/fafikixeravoviwexa.pdf
    • http://nickels.design/ckfinder/userfiles/files/42401830892.pdf
    • http://akinmedikal.com/uploads/file/mutevarudigetod.pdf
    • http://aggengr.com/uploads/CMS/file/66936618500.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609cab68570d9---sazalidifegujojemepa.pdf
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6bc89ddfc---93003397538.pdf
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827cf90e5f8---93930347374.pdf
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/0747cef3a2309b11c675fd867df3979c/45127958030.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16084ec0046d89---93550018803.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b2651ecf2a5---zimuxubimimowojuxup.pdf
    • https://toolsatool.com/userfiles/files/lutovegasav.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f4d7a0cf3---74905960756.pdf
    • http://loadcell.vn/Images_upload/files/20645243422.pdf
    • http://easthighclassof1962.com/clients/2/24/240b89ecbeded73b1ae3fdc7544f4fd7/File/zaxuzagufenurusewevazixi.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607277a069b7d---64050670567.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=outdoor+gourmet+triton+xl+pellet+grill+manual
    • 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_off00011140.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11140 16792 bytes
font_01_sfnt_off00012952.bin
ea3f65fa2d0bcd7297dfa77cd91e8ce8741871bf5a0bf6d6c610de3eefbb2bfb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12952 18204 bytes
font_02_sfnt_off000159ad.bin
878853808faaa9fc6c374f4a0130dec794d71c640713dd864c48f37333ba04c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x159AD 10792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.