Malicious PDF — malware analysis report

Static analysis result for SHA-256 69bd6acfb97ce58e…

MALICIOUS

PDF

70.3 KB Created: 2021-10-03 22:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 00aa202c7cab8794c12468425ce1d136 SHA-1: 61d03ee9ee5ff922a1152f15639d7643a5be3470 SHA-256: 69bd6acfb97ce58e52f8856aeb7079f39c899641a4d18bb53493ba298863f7ce
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to disposable domains and are likely used for phishing or to redirect to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to lead the user to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://krisoc.ru/uplcv?utm_term=how+much+robux+is+1+dollar PDF link annotation
    • http://dirpub.org/editor/ckfinder/userfiles/files/medov.pdfIn PDF document text
    • https://urology-andrology.com/userfiles/file/gadozin.pdfIn PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/f2bb6b795b037ffdb6e600483a73102f/95382479965.pdfIn PDF document text
    • http://aalzkj.love-mrt.com/upload/files/puwezored.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/gifogiximemukelir.pdfIn PDF document text
    • http://wohntraumgmbh.at/55495908054.pdfIn PDF document text
    • http://muratay.nl/userfiles/file/95582201363.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/96093322710.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/11527565907.pdfIn PDF document text
    • http://floramarble.com/uploads/girejunasesunadidekufaj.pdfIn PDF document text
    • http://www.cavice.fi/tiedostot/files/ragejopipaligakifemobik.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/sumapixaxovidufevajonekup.pdfIn PDF document text
    • https://selispin.net/calisma2/files/uploads/jadakozubijobezibamig.pdfIn PDF document text
    • http://radio6deenero.com/uploaded/files/6186856034.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///31099299272.pdfIn PDF document text
    • http://xn--h1aeekk.xn--p1ai/files/file/79465075019.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/9178ed9adf86c2a2e99f94d06f4c56da/2589698821.pdfIn PDF document text
    • http://123flower.doweb.kr/upload/files/roderubob.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210918_CA746AAAB6153F8B.pdfIn PDF document text
    • https://go2germany.ru/files/file/momidugipojiriwadegerop.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/wekaferudijavivazaxisulot.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/wiramojarej.pdfIn PDF document text
    • 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_off0000b0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0FF 16432 bytes
SHA-256: 768be9bcf679c5d82e53530bfea6bf24b85d3cbdaff3b953bc725f09639d8f54
font_01_sfnt_off0000dad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EB 10772 bytes
SHA-256: b512a061215354a40f0fb4d01bea16d45e1345c1f124e36fe725dc42363bd1ef

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