Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c928b602962a248…

MALICIOUS

PDF

78.0 KB Created: 2021-09-10 23:36:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01414ac7b3e11de48b474e08a98ad0d6 SHA-1: d560bd0b81174411d34f53a1579731794e1a285d SHA-256: 7c928b602962a24887beddc15b4fdc544d0f2c68190c96dffc638d3e5b18bf09
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features numerous external URLs, many hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier further indicate malicious intent, likely to redirect users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7354

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ketchas.ru/uplcv?utm_term=xiaomi+note+10+pro+price+in+usa
    • http://xn--82cac8d3ajrc0gd0bo4a7nf3qg.com/userfiles/files/7427803035.pdf
    • https://am-system.eu/ckfinder/userfiles/files/97365072924.pdf
    • http://www.urbanwaterways.info/files/mojolakedaw.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161303eb3f19e0---65681520498.pdf
    • https://oasis-travel.ro/files/sufilujodagel.pdf
    • https://jamuiboe.com/webroot/upload_media/zibar.pdf
    • http://supermarketdv.ru/files/file/javerapemizixozo.pdf
    • http://pkpneu.cz/userfiles/file/88595844515.pdf
    • http://tolaniprojects.com/userfiles/file/fejedizilikudu.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/p5p2j5gdd9irujbod0oq6jf6in/josifoxegavetumibubom.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1612f21b29216c---93013723312.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8f4e2120b---61840077167.pdf
    • http://diakmelo.hu/ckfinder/userfiles/files/tivopaz.pdf
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/98019195985.pdf
    • http://bwc.lt/i/69101607388.pdf
    • https://bawauang.com/contents/files/87474697865.pdf
    • http://abovomedia.hu/_user/file/dizewazimuparagoba.pdf
    • https://npkfertilizerproduction.com/d/files/zowuna.pdf
    • http://n2nnetworks.com/files/others/71399217510.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2fded730a5004767ff1cbbc45edba2e2/jimamap.pdf
    • http://chapaconoticias.com/assets/ckfinder/core/connector/php/uploads/files/wamiwemejijekegedamuri.pdf
    • https://terminal.hr/userfiles/file/firilatalowakom.pdf
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/xakinikum.pdf
    • http://xnucleus.com/members/member_images/files/66775916108.pdf
    • http://newabel.com/ckfinder/userfiles/files/5044256136.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e176.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE176 16792 bytes
font_01_sfnt_off0000f98d.bin
0f5ab3b096b7081f6178a833fa8afd2e94c4509a7116373bab9657937f23de3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF98D 10768 bytes

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