Malicious PDF — malware analysis report

Static analysis result for SHA-256 62858df0c28792d6…

MALICIOUS

PDF

85.9 KB Created: 2021-08-02 15:01:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 78de6071a6a44ac04ac1e33180de1b96 SHA-1: 36d98ae71cad83385a027dd0c6d279795cea932f SHA-256: 62858df0c28792d69fa7073a2980ac98a53aa11da680ddbae668eef616cf9a56
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and embedded links align with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/f88e1ccacde8e8482a92e545dce1dd59/zisor.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e3204960c8c---745318609.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083382c0b8b5---fuvasimiza.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/7360fe0e7f559f9a5e5eabb44c794133/dipizerukajedotofe.pdf
    • https://tselectromechanical.com/uploads/CKfiles/files/rofotum.pdf
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/wudafatatawudug.pdf
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/1640627370.pdf
    • https://cyberbirddog.com/userfiles/files/bowokoxujarufi.pdf
    • http://koszyczarek.pl/userfiles/file/51287750213.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/59829f2cb21e3cdbf395b853aa872267/womufivojofi.pdf
    • http://trustycctv.com/ckfinder/userfiles/files/sinisixokorupalu.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0fcbf928f3---tivuvewevakazaralevanu.pdf
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ac41a1e932e---rutijoxum.pdf
    • http://hnkingdee.cn/Files/file/202163016572.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcbe7e2d42---vijopebazifufedoxaweruki.pdf
    • http://tfh-filter.hu/_user/file/16928887037.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/dda460d0d68c980f329cef266fbe74ff/xafejajelupatibiloji.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/b23dde94c3351b153ab762b25cbf8f25/12036695575.pdf
    • http://vivaldiskibus.com/FileData/ckfinder/files/20210713_FDB36C75934091B4.pdf
    • https://jjpremiers.com/files/23854934987.pdf
    • https://www.peeryhotel.com/wp-content/plugins/super-forms/uploads/php/files/561ff7c1f21ccf73f42701d5f05d4425/12511784829.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/085b86d40a995a689d940d8554253fac/72329220356.pdf
    • https://am-system.eu/ckfinder/userfiles/files/darofim.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/660f3abad11195d1412dcb5e3ebb90f5/lodirekiwu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=why+won%27t+samsung+remote+work
    • 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_off0000ed4b.bin
7c225a02a300300cb8674a65ef3d9aeb44e5f6d066a406f28ffbcbad1457dfbb
pdf-font-stream PDF embedded font (sfnt) at offset 0xED4B 16776 bytes
font_01_sfnt_off0001190c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1190C 16792 bytes
font_02_sfnt_off00013123.bin
055594239d79957c2ca8c18449e3aef373473201a92c5330121fbbbf4132ef8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13123 10836 bytes