Malicious PDF — malware analysis report

Static analysis result for SHA-256 d692462a707cfcd2…

MALICIOUS

PDF

86.7 KB Created: 2021-07-02 12:21:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f324ec336e946a334c2e2fb241d086f3 SHA-1: 1a867a65776a64f70e06792d843e37defb61ff1a SHA-256: d692462a707cfcd2b759e805bb320b91f7b21ee2a278c978b6c52da16a0b5bc1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to distribute malicious content or phish users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/8f2154e5be07e213983c8ea8e0bf3412/49318762495.pdf
    • http://fecirturizm.com/resimler/files/85938499134.pdf
    • http://gagutp.com/sa_upload/userfiles/file/20210616113213.pdf
    • http://karinameal.com/imgdish/files/60893844365.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/7561b957a5f191aed4c400031defe3db/vuvekasalixako.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/b605oj02987cnu8735k9hfusp9/55382220676.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/77a2774b1c7e9621a6aee21978bf9ee5/62424760636.pdf
    • http://eternoohydro.com/d/files/22112948453.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/14138706291.pdf
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/cc41c790fbbeb6d641d592a46f00de0b/pakupit.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb3b3a8a91---kotosigaga.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/f6f01e296497422576391a2d0a110629/waxafonive.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b410448fe3d---funupila.pdf
    • http://abpaluso.com/upload/file/majawemijavuritaxizo.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d29a12783---tozimusidop.pdf
    • https://arichaindia.com/userfiles/file/29894400555.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/95c0abfa183f37b6dc8ba81791a54a47/91494738706.pdf
    • https://laserbeautymachine.net/d/files/pobesuxudufadaboxuku.pdf
    • https://nazragame.com/calisma2/files/uploads/zedijupamav.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f616bd45d0---vavofanulitokifigulu.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/e0af1f131e83ee32ac69e54720c9cdcc/wewivozaborane.pdf
    • http://fqcycpa.com/jingkelun/userfiles/files/20210619154926.pdf
    • https://goodline.by/userfiles/file/fopiriguvizemorosixakezi.pdf
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bab0078c1---nefisekiwiwojoliwedov.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=red+personality+test
    • 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_off0000f14a.bin
682ca38a69fd5259b13945ad5c59ae8283c85618e79f4e0d59c08995bf9a4931
pdf-font-stream PDF embedded font (sfnt) at offset 0xF14A 16832 bytes
font_01_sfnt_off00011d78.bin
7e89bb9cc6cd59912067d8644fe9807b86ae95de8829dd913ad9fd60a870e4c1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D78 10544 bytes
font_02_sfnt_off0001359c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1359C 16792 bytes