Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7f8c0b322d3f36e…

MALICIOUS

PDF

102.9 KB Created: 2021-09-05 20:55:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e177ed965bf281e9a79067fad24ec507 SHA-1: 69ec593ec3433dfc1d3b5919a681ff2f647ff807 SHA-256: b7f8c0b322d3f36e23a94550cb8c470749f38d9a161bed0c2201b1dce3952c32
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms or disposable domains. The presence of numerous unknown URLs suggests an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://izdepskifamily.com/clients/1/1a/1adacdf247316bc4617b3617d965acc7/File/merimilakivowajodibato.pdf In PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4cb58a278---70830324431.pdfIn PDF document text
    • http://rideco.hu/upload/file/96464507357.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/89399032626.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/b79bc1483be0a9f007034b4fe1d2240e/favobanetuwegape.pdfIn PDF document text
    • http://ngoinvest.com/uploads/ckfinder/files/rovaf.pdfIn PDF document text
    • https://kawanmto.info/contents//files/nusifedizapaminekaxeder.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/zalibofilajowo.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2a03e48fde489d1747507a6f229d0f8c/mamidagepunuma.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b45527f24d8---98409001953.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/98966258954.pdfIn PDF document text
    • http://ildongwire.com/userfiles/file/repalamadoriv.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/lobudelege.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/13485031038.pdfIn PDF document text
    • http://birdwatching.sk/media/file/wezimanigumim.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/14195404871.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/b6aed7582f1e424a61c4c8aaeef235fc/wabuwuxonalonir.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/samesalovipanegalifazofi.pdfIn PDF document text
    • https://mama-light.net/business_school/uploads/file/66130235245.pdfIn PDF document text
    • http://erainbowrealty.com/userfiles/file/rasovuvememaju.pdfIn PDF document text
    • http://ofitecnic.es/files.ofitecnic/fck_up/file/zoxowevuwumozekulugi.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/f147fd57b9cb53ff3ff5026576b7e4e1/15064225254.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=silogismo+juridico+ejemplos+pdfPDF 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_off00012a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A0D 20116 bytes
SHA-256: 0d9b0cfde0be8be8c4ee8c6cd4416dd37d918f8918d7ee38ad12b1b5bb878c4d
font_01_sfnt_off00015cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CC2 10904 bytes
SHA-256: 92922b5c758a4b35a4560b7f786682320e452ba6068216bd79647d28c953cd63
font_02_sfnt_off000175af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x175AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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