Malicious PDF — malware analysis report

Static analysis result for SHA-256 395658014c7eed6f…

MALICIOUS

PDF

81.6 KB Created: 2021-09-01 06:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a07932e0b25d24cc217b268b66a6c42b SHA-1: 08405d2f237d757478b91e630889f30e158efec8 SHA-256: 395658014c7eed6f21d5d68023a2375b76db6ac8e72eda48f23828994dccc6ab
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other potentially untrusted domains. The primary goal appears to be directing users to external resources, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077e87e917cd---vaguf.pdf In PDF document text
    • http://nicenpos.com/userData/board/file/damefi.pdfIn PDF document text
    • https://projetounificado.com/uploads/files/39259564396.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/majusifojafonafizelu.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d81523bc5a---lowupodoligumumot.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/50077716028.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/it05vfadmicq7fs8h9f3pt1tv8/50883346711.pdfIn PDF document text
    • https://laatjehuisweerstralen.nl/upload/file/39799625566.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/6408977720.pdfIn PDF document text
    • http://alkanboya.com/files/file///97865093388.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bdbe945a052---48919571538.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/93262434546.pdfIn PDF document text
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/gopuwuvit.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160be08e8a8941---zorokigek.pdfIn PDF document text
    • http://drukarnia-skawina.pl/app/webroot/media/files/81067058068.pdfIn PDF document text
    • http://paraglider24.de/pics/fotos/1/file/24152453331.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/ronab.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/lonixe.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/95092940266.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/6n2qao5b3cdvnumv2lfihkcc1n/vitiwijuvurot.pdfIn PDF document text
    • http://teakdeck.pl/files/file/befojuk.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45c60bb7a4---4400749979.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=the+compound+that+is+most+difficult+to+protonatePDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9E 10948 bytes
SHA-256: 505468f984b885d5be497cb2db03f5c93faa7c9ee0a6e4abda3802a0989ea7f5
font_01_sfnt_off0000f3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C4 17056 bytes
SHA-256: d83f88867ea049c1e1a2290c08e69ef8bb58bc05afbe40a36bc2bf01014835ec
font_02_sfnt_off00011fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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