Malicious PDF — malware analysis report

Static analysis result for SHA-256 96a9b164dbfa8a61…

MALICIOUS

PDF

81.7 KB Created: 2021-10-08 16:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 9459482b32e54d7bf00b030f190caf66 SHA-1: 8683014a02f1f0b559ba1601164659ab87a6b5eb SHA-256: 96a9b164dbfa8a615ec5d0b3038cfe12928cc78c39ef0df5f36f416e84266123
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with many embedded URLs pointing to compromised CMS upload directories and disposable hosting. The primary purpose appears to be directing users to malicious content or phishing sites, leveraging compromised infrastructure for distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/c37fbfae1de8f27aeef300e64878eeb3/bikawit.pdf In PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16155d5e155935---18452303336.pdfIn PDF document text
    • http://issaproject.com/app/views/panel/ckfinder/userfiles/files/63318988139.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/915a34c1597f06cee509edda59dd4a41/tenuxefokudanodidowu.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/tidofowutuvaj.pdfIn PDF document text
    • http://abwcrainhwy.com/uploads/files/14544828580.pdfIn PDF document text
    • https://sydneystudytour.com/accounting/userfiles/file/zesotisiw.pdfIn PDF document text
    • http://liily.jp/upload/file/20211004110901.pdfIn PDF document text
    • http://dakdekkersindex.nl/images/uploads/gavoki.pdfIn PDF document text
    • https://zmiz.hr/userfiles/file/64947261402.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca21099427---virotujorog.pdfIn PDF document text
    • http://escalierdurire.fr/ckfinder/userfiles/files/20166490668.pdfIn PDF document text
    • http://heorungminhphat.com/luutru/files/zelositasagotekofu.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/29005673664.pdfIn PDF document text
    • http://dichvuhieuchuan.com/upload/files/forowaxuwafid.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161443e70a8e57---91140068835.pdfIn PDF document text
    • https://livewireeventz.com/userfiles/file/32107713811.pdfIn PDF document text
    • http://jshtextile.com/UserFiles/file///60521546964.pdfIn PDF document text
    • https://hanomanberjaya.com/contents/files/6530879871.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1615e4f2051f56---90376909886.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/20287980904.pdfIn PDF document text
    • http://loaamtran.com/files/usersfiles/files/wolofabedujin.pdfIn PDF document text
    • http://loaamtran.com/files/usersfiles/files/navokiwazerufajumuzowex.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/bavifebariberejunog.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=download+film+dhoom+3+full+moviePDF 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_off0000dbe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE3 17388 bytes
SHA-256: e8feb240285914290b81f58e63c009bec761f6159ce93e9f34afe24a12afb19b
font_01_sfnt_off00010925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10925 10676 bytes
SHA-256: 34905cfb481e575d08c144a7bf9c36638a21a0e246abbb952c872a3ca59ca9db
font_02_sfnt_off00012178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12178 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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