Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bdc4813f6acb25e…

MALICIOUS

PDF

78.6 KB Created: 2021-06-29 10:53:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6f19f1404fa9cb89ecfdfa73c9b2703c SHA-1: a34e041491f9b61256afec0b7c67a1b6bd325088 SHA-256: 5bdc4813f6acb25e49282e314146abc51874e3fa8bb5566f4b36dea58ed7f450
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress sites, suggesting it is part of a phishing campaign to distribute malware. The 'money laundering simple example' UTM term in one URL indicates a lure to entice users to download the malicious PDF. While no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest it is designed to deliver a malicious payload, likely a further stage of malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d090fd722b---46057951758.pdf In PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16080c01663bf6---kifidizanujawonizigezege.pdfPDF link annotation
    • http://ecohost.ru/pics/images/file/1272376617.pdfIn PDF document text
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/mutulobuvi.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608170f309876---42408113947.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/16724898542.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/jqv8lfkrvnibpkonpjgfimrmd0/nukurewedagise.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/df998907619fd5dafbc130ddb6d6943b/6069581094.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/jdai646909jh7isibl22t9v32j/tevajimumuwiw.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/bufar.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099723300dae---zodovazotiri.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3fa9a3704d---tokasunifexekef.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2dd888b321---60021196976.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b6810e9267c---dejabede.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/44918925494.pdfIn PDF document text
    • http://juentai.com/userfiles/files/55750209393.pdfIn PDF document text
    • http://esistore.be/userfiles/file/gizedomarotilajuk.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/68895276609.pdfIn PDF document text
    • http://xn--aknmedikal-yub.com/uploads/file/80145543341.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6c6c46e80---jilajug.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/ldrtejm19nd72t665ju2i795ji/30838034506.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/b808cc6fd484b8cf83e96cf83524be9b/zevelifeliwevavafu.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076da416cc07---garuweja.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=money+laundering+simple+examplePDF 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_off0000d0da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DA 10948 bytes
SHA-256: f08545e510d8e75eb39cfc1d098c9e3e6761af5d38dc4ed2867349ea74a17a56
font_01_sfnt_off0000e9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001020c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020C 16656 bytes
SHA-256: 7b4be17513b1c5d2ae5d2a31583f3e352cb34a39b7361968f3d09cd7d40ef825

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