Malicious PDF — malware analysis report

Static analysis result for SHA-256 0072e326821ceba9…

MALICIOUS

PDF

68.4 KB Created: 2021-09-27 23:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4364dd84f2be0f25d90aee36effd41c5 SHA-1: 3574d6f4d409acc6d3dfc332896230c0a85fd321 SHA-256: 0072e326821ceba91581bc316d90cdde5026c25992d8fd1a95d6bf7a15e5555c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, many of which point to potentially malicious or disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://jfhcoaching.nl/userfiles/files/fapono.pdf In PDF document text
    • http://4x4autok.hu/userfiles/files/jilaxepulalukevil.pdfIn PDF document text
    • http://naszemotyle.natura2000.pl/imgturysta/files/64161234512.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210917_D6DC6A9927F17954.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/japofulubakelododasi.pdfIn PDF document text
    • https://immo-macedo.lu/userfiles/files/29027846142.pdfIn PDF document text
    • https://soudurelausiere.com/upload/editor/file/vopizedikazake.pdfIn PDF document text
    • https://bczenekar.hu/files/file/niwamutazuzejejifax.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/fbf59e0589d4cb1ecec294b8ac089ca2/jopuzigevoveperut.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/99760713767.pdfIn PDF document text
    • https://atlantidegattico.it/file/41593754832.pdfIn PDF document text
    • http://fredericjean.net/oplusco/file/nosuzefewuloxini.pdfIn PDF document text
    • https://eletvital.hu/uploads/files/46953706981.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/pajesokewepobiwodusovadep.pdfIn PDF document text
    • http://195exim.com/datas/files/51615251818.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/80825464326.pdfIn PDF document text
    • http://orderbestwings.com/uploads/files/pexudawimozil.pdfIn PDF document text
    • http://nfc-lampang.com/user_img/files/wejirawizopijanini.pdfIn PDF document text
    • https://hearing-outlet.com/uploads/files/202109151052578633.pdfIn PDF document text
    • https://powerliteaac.com/userfiles/file/riforirezuraduvenegov.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/zilelati.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/26421762240.pdfIn PDF document text
    • http://hermandadperdon.es/userfiles/file/bijoroxaz.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150c910321b8---tavufakebadim.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=freddy+mod+apkPDF 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_off0000af22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF22 15136 bytes
SHA-256: 6c95e975b22a768b9d997e2fb12b5ef3c55142fd38ad4e99d17665fec946d078
font_01_sfnt_off0000d54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED65 10228 bytes
SHA-256: 24b2cf83ec79f44bd59659922d201dfa0d3ea88369729ed1737d2d6969d866da

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