Malicious PDF — malware analysis report

Static analysis result for SHA-256 747ffa175bbff545…

MALICIOUS

PDF

91.0 KB Created: 2021-08-10 12:49:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 913eb5cff8ff22de1c25647e60580b28 SHA-1: b6d4cde24dbac7fe9acf2b826835987c5dc4bdd7 SHA-256: 747ffa175bbff545a78149290f13019879a51f357ac0c531e46106abb42ad017
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The presence of external URIs and the overall structure indicate an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://autowagon.it/userfiles/files/39347670033.pdf In PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607c42064e595---95490253950.pdfIn PDF document text
    • https://uleshuzatabc.hu/files/file/finilujijosakokezure.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/37763862245.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/28591681974.pdfIn PDF document text
    • https://alshamiltrading.com/alshamilfiles/file/ruzoforelubituxipov.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bffd4fcbf---63124824182.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/xanevexawobu.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/zumadadadusutovaxoka.pdfIn PDF document text
    • https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/fibes.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/a37af1944826b78d3e5f91a192e53bc6/rovok.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085e5d8660f6---bekulupan.pdfIn PDF document text
    • https://basisnomor.com/contents//files/zokaper.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e8ba321cc---3020805712.pdfIn PDF document text
    • http://gamjagolla.com/uploads/files/57984142723.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/sugigefuxoxadidijesugekif.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/nemodirarukuwomoz.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d94349f0c0---8851396483.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/99131214642.pdfIn PDF document text
    • http://cherishedmomentphotos.com/clients/8/84/84fe84b553acfcd191e166b7401b6f02/File/pagapopu.pdfIn PDF document text
    • http://timatey.kz/wp-content/plugins/super-forms/uploads/php/files/2tkaifa4n2kqqdbhf6d1c4j822/xavafinavoli.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/13934967489.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=roblox+exploits+for+windows+10+no+virusPDF 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_off0000fd24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD24 11040 bytes
SHA-256: 1f3aebff3545891e6a08e48fb231b4706908f33018c10bc3a3e9138c1ef37029
font_01_sfnt_off000116cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CF 17516 bytes
SHA-256: c85213d1cc3e39f8486bbcf41601393c66c913fe0dd30a0f4ab1a94a2344eeeb
font_02_sfnt_off000144c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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