Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc3be169e497baf…

MALICIOUS

PDF

85.1 KB Created: 2021-06-25 18:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3297785bdc127cdbd1135680bd97daa SHA-1: f52448b1df57d0c01db41012dfceade3cd680bf0 SHA-256: 5cc3be169e497baf6821094c322ded65670be5ee3b900c9ac74ad158aec3dc03
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body is unreadable, but the heuristics and URLs confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bc33dfb2d---gogoviponija.pdf
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/96da59ae11f2fba4900fbc4aae847019/dumenolixupunosikedonip.pdf
    • http://drivingschool-brno.eu/files/41961345150.pdf
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/9cff4dee561f20237f52427b08b93eae/49016501989.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/v3942vbhm4rqpgku290ohtrnjm/49892195709.pdf
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b5a708ccb258e0df2752d4f9422402c8/13156862314.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b4858319f---82429913938.pdf
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f355a140cc---wozojabemeluwod.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607712c6377f5---refus.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16097870c2ee7f---12390749295.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/iarrn1r3pteph6c8io13bgt39t/44798687469.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/691bfca56feb46278052c01ac3f1d758/denexageziniwefolam.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160965e0dbc457---42685875433.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a6d4989335---vategenebomop.pdf
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/potaxo.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807952e30dc---kuxevorifevulojefenovina.pdf
    • https://www.erenang.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe96fc7cd0---fevex.pdf
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/8bcc254e5eccb600b730772fb04e553c/85204327327.pdf
    • http://jdhs77.com/clients/58520/File/vikuwewasabufuse.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/d6d68b21c0efb30795f95ba01e7fc68f/wiretexizenozozavevenopo.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a7fd490fd43b5a7e16ede4d06f707c84/giwavovefotu.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771baf068e9---88190801485.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/30f04080a6ca8b8bf71920b0efb4600a/gakiwipurisenotitiga.pdf
    • http://indago-rovigo.it/userfiles/files/63840910215.pdf
    • http://jjinline.org/file_upload/file/korizanajijawinutujuzufo.pdf
    • http://groupkaishan.com/d/files/dipibovomafisapibatanaj.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=reality+lost+frequencies+meaning
    • 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_off0000e744.bin
eeeba0d57d159c41e3e573ddf8afe09caa1318a8465f5cb66a26e0bf3bd4eee9
pdf-font-stream PDF embedded font (sfnt) at offset 0xE744 11084 bytes
font_01_sfnt_off000100de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x100DE 16792 bytes
font_02_sfnt_off000118f0.bin
62d88b1ecb531b7030cd8f48ad669f0c30bd781aa1216c5a4c69d355fac0625f
pdf-font-stream PDF embedded font (sfnt) at offset 0x118F0 17528 bytes