Malicious PDF — malware analysis report

Static analysis result for SHA-256 078b21549f9cc7c4…

MALICIOUS

PDF

93.5 KB Created: 2021-06-25 14:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 151b335bb1db39b89a04d3a3ff99df4b SHA-1: b5964bd497bff268a6b40bc3ecabbf3e7a293e09 SHA-256: 078b21549f9cc7c47b9c51bac1b9c7166d8eabf77d66e4371d8fa071b3aa3675
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, directing users to multiple external URLs, some of which are hosted on compromised WordPress sites. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, suggests potential for further malicious actions like payload delivery or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zionapostolicministries.org/uploads/file/38285553374.pdf
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9f8edb38e---57556335433.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/a0e3d519f66193722bf4313d9abbf52b/61568268492.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a686e5ab8e5---94902846441.pdf
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/u3e17qe9o77fci42kan6ssbov0/witepomid.pdf
    • http://phrabat.net/UserFiles/File/duvivovipojav.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/02852aa9ae060236758e7583d345923a/88271190859.pdf
    • http://caf-ljubljana.si/docs/lapaxezuwijiz.pdf
    • http://madveras.com/ckfinder/userfiles/files/pifuvifopuxijajuvom.pdf
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a784fab49ae---66049335143.pdf
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/41f575curh82dmc95n42d7nq15/nenolariropemazenovetel.pdf
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/9aq2stroidha78vp6g72gutvca/67009984495.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/hfmpsh9q0q4v7h5lepv71posrl/wuwififurov.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/49770811772.pdf
    • https://datajournonepal.org/files/midenufivoxinivasisu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+to+make+your+peni+bigger+fast+with+your+hands+videos
    • 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_off0001084b.bin
598e7d2152861947433126d6e6055fbde34170a10129fb7046edd84947487859		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1084B 17620 bytes
font_01_sfnt_off00013608.bin
548d886a7b5b11c37474faf33ebaeab0180cad6a60139bc9d3ec55134120b7b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13608 11488 bytes
font_02_sfnt_off0001509e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1509E 16792 bytes

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