Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad0d6796f6dff3c…

MALICIOUS

PDF

85.8 KB Created: 2021-09-06 18:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e9a494df4171477441a3a4081dc028d6 SHA-1: 222d799e9c24a59507f18326da5fccf5eece5768 SHA-256: bad0d6796f6dff3cedab7433933f2b73597530695c6d9cd403e0b1c43ffb53eb
156 Risk Score

Malware Insights

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

The sample is a PDF file detected by ClamAV as a phishing trojan. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or credential harvesting campaign. The ML classifier also strongly indicated maliciousness. The PDF structure and link farm indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4a4b1ce573---32815871837.pdf In PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161238bd0dbc2e---lolal.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb866a5fd49---98744684821.pdfIn PDF document text
    • http://motocams.cz/ckfinder/userfiles/files/soterudola.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ed467a39798---652965985.pdfIn PDF document text
    • http://isvpro.com/custom/files/96213351996.pdfIn PDF document text
    • http://itaxabc.com/userfiles/file/20210818215239_1591183388.pdfIn PDF document text
    • http://memphiscentral1969.com/clients/865565/File/wefarokumarudigumemoxo.pdfIn PDF document text
    • http://dothi.info/images/files/fetolipiliwufo.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/25777202843.pdfIn PDF document text
    • https://sibiucuratenie.ro/fckeditor/userfiles/file/51159803461.pdfIn PDF document text
    • http://heizler.hu/files/file/34754119525.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe7ef59128b---bunupilujutazek.pdfIn PDF document text
    • http://fusiongrup.ro/userfiles/file/wadopezevobijijuz.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/g52osiua1v62c6i0u588flstak/43701494109.pdfIn PDF document text
    • https://alquimia.in/admin/fckeditor/editorfile/16235313260.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210512/210512072129568678rv6d5gi0kmuw.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a6fc5c8dd---wagusubewe.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/16564840588.pdfIn PDF document text
    • https://korzo-galeria.hu/files/file/31697829248.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/komap.pdfIn PDF document text
    • http://wisdomtours.net/upload/file/detabisabumopekaletaxu.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d0ffb7cf1---16862832230.pdfIn PDF document text
    • https://murten-hotel.ch/userfiles/files/7522422358.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16099fd5b0e0f4---foresetebivenexek.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609706776c8df---dalivu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=evenflo+position+and+lock+wood+gate+manualPDF 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_off0000e2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F6 20016 bytes
SHA-256: 53415f808c255127d9aa9fd1124af5da26990cfa0fcfd2246ed79b8cb3e496a9
font_01_sfnt_off000116bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED2 11188 bytes
SHA-256: e69af9658ef347b2f77002cd75129d6f675e8ac0874ce896b530a5f2e8289235

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