Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be3f077aa0dcadd…

MALICIOUS

PDF

88.3 KB Created: 2021-09-04 19:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a6a4da34151af02c440ee10b6ba079c2 SHA-1: 651ae709b3e308542f6b5e0caef51c8d0bc14cd5 SHA-256: 8be3f077aa0dcadd1df1254c526c1f44901dc75d0c00a8161a5bc67f682f26be
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest a malicious phishing or trojan distribution intent. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://queure.ru/uplcv?utm_term=redken+color+chart+pdf PDF link annotation
    • http://moestuinwebshop.nl/userfiles/file/57302704797.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/f3f65ff4b3e9db1f7c93c84cce93c222/41265531984.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8ca0640c3---xuweximorenawigavanujok.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/p2hvn8stg2kuq4h80pbp1a8vkm/mopodakileviwesorenogaxal.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/ruwazaneka.pdfIn PDF document text
    • https://isleo.com/i_photos/file/tawize.pdfIn PDF document text
    • https://csodamalom.hu/files/files/zuxebomeperexazekuror.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/nebux.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/58438787261.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/faxurefapovavirak.pdfIn PDF document text
    • http://kaies.cn/upfiles/file/86399650300.pdfIn PDF document text
    • http://mutitar.com/user_img/files/xevuwosizot.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/992dcb971fd6334f33be218aa5053944/mowegonap.pdfIn PDF document text
    • https://victorybear-info.com/userfiles/files/vefalesasimawafij.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cc341c253fd---7957433302.pdfIn PDF document text
    • https://stopserv.ru/files/file/bupukubawajam.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/274247af32611a76af26edfa38cdac17/nijenuw.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/6mugk8lfkkir7s0j87u63maip5/88969194045.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a283299d5df---ginagebidatopupavo.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609d7d089521e---98245446153.pdfIn PDF document text
    • http://www.dawnrotaryclub.tw/UserFiles/files/27030939149.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/4814948975.pdfIn PDF document text
    • https://citytrafik.nu/images/file/loxizokubotar.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF421 18328 bytes
SHA-256: d705a98741c7823068abf4f2230a71810b30974c6565ff6a7469c71b7eb28873
font_01_sfnt_off000123af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BC6 10596 bytes
SHA-256: d806cc6b152c40b87f963043f3817f1bd716c9cf6801714d3ae1cedd09bf44a2

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