Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab060bcdf3c70ac7…

MALICIOUS

PDF

90.6 KB Created: 2021-10-12 05:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 82c84612b94224f6c362fd72ae63a243 SHA-1: a7a54970bdd47905d63f0b0ad4e5bd47ac8d0a98 SHA-256: ab060bcdf3c70ac77c6e50a38f678341008f53dafc6ac70b33cc6c8de71da812
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://magic-mugs-factory.com/uploadfile/files/minonodawipujo.pdf In PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/38858095036.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20211005071744_rzu16u.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/natujetutadujurumozitakaj.pdfIn PDF document text
    • http://tenis-klubmoj.si/uporabnik/file/4332629491.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/27956964498.pdfIn PDF document text
    • http://stellarp.com/userfiles/file/8982347216.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/93419379132.pdfIn PDF document text
    • https://at2-turbo-j3t.com/contents/files/39660125106.pdfIn PDF document text
    • http://vanxuantravel.com/upload/files/99038795196.pdfIn PDF document text
    • http://popmetre.com/news/files/pewatobogile.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/bigajofutibakexaz.pdfIn PDF document text
    • http://thienthaopc.com/upload/FCK/file/24547152005.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/zosesaxu.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/fizuvarogakawemuf.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/21404917795.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f3c540fdfc---23925121185.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/42013664275.pdfIn PDF document text
    • http://apsons.eu/files/file/tawojakuju.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/wekuwekijepuxuwexukola.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1616080f920f33---gumaneguwole.pdfIn PDF document text
    • http://pataibicaj.hu/userfiles/file/kuseg.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc22b0e5d6---xepidofanatejifuvar.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614663477c0ea---80972133499.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1612f076540b0c---tagab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/BcFPVxLj4jw/uplcv?utm_term=what+is+a+community+college+vs+universityPDF 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_off0000f8a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000110b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B6 19456 bytes
SHA-256: 059a0ecb75d41a6a989404a5f72d51a7a5ed516ea5e5a63580e029db33709723
font_02_sfnt_off0001435c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1435C 10948 bytes
SHA-256: feb7af215a758b4285a3cefea7bcddd25df756a0d3ad00d6585cc9401ba53da1

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