Malicious PDF — malware analysis report

Static analysis result for SHA-256 febb17d645b04c58…

MALICIOUS

PDF

88.1 KB Created: 2021-09-03 17:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3af9aec5153cd84f537edc32a2560f10 SHA-1: d0361cc542da8db8701a0db9dfc5ea9abd036b0d SHA-256: febb17d645b04c58ddb7c62d817a44cdfa508c537932a371c97ac71206e91d98
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm for phishing or malware distribution. The document body is heavily obfuscated and unreadable, but the presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a pattern of directing users to potentially harmful URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/bovojodap.pdf In PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/tatunemuropajixewusixu.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/42509060127.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/c8103d84f4fc2d2364f0e3f14b99f2ca/bowezisaxez.pdfIn PDF document text
    • http://hyunbulsa.org/~ewedd2/userfiles/file/kesav.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/0233035c22726eabf393803aea3800ed/fusifuv.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767c6e191ff---kasot.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/19361430554.pdfIn PDF document text
    • http://universalgroupautos.com/files/others/kagugiwokuzuzotirasifed.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/064db97c25ce8b854e882a36c499a571/85849302499.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/nowesivewomo.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/a3d1282635ad5de0dec9dfe953b6eacf/kejupivedaxuzol.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/05211a3aafe314e4d55265f6fc79071e/62761712464.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/d0037c448b17475915e4f1d3aa5457d3/74759604297.pdfIn PDF document text
    • https://aimara-bg.com/userfiles/file/9861687075.pdfIn PDF document text
    • http://modero.vn/upload/files/81742419083.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/dozosibojokuv.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16094a5e433333---gojolomonazaledariga.pdfPDF link annotation
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b6385e4bd---zamejopujebejo.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/23241258675.pdfIn PDF document text
    • https://guptajimarriagebureau.com/userfiles/file/saxakemugifenewiwitata.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e00e54e4e---12240729842.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=mcsa+windows+server+2016+complete+study+guide+pdf+free+downloadPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06B 11784 bytes
SHA-256: 525ee2db8dd4d78365436bda41ac99a311f65cb6f9b37653339dcc280f8f8e7a
font_01_sfnt_off00010c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C90 17516 bytes
SHA-256: 4869ed24ce4b1bb0b0e79acbaf3358b2560068c0e3f04b3fa1871293b6e97691
font_02_sfnt_off000139da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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