Malicious PDF — malware analysis report

Static analysis result for SHA-256 9018c6c877024ed1…

MALICIOUS

PDF

84.5 KB Created: 2021-07-18 01:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8419623ecbc6e282a38d7fa8168d0048 SHA-1: b4ee19735ecb0bf4c63a063ce9966afbb19fa261 SHA-256: 9018c6c877024ed10b8d77b1294681b5b3307f2a98413ba768fd5066630b5b80
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised WordPress installations. This suggests the PDF is likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://www.odnpoznan.pl/fotki/file/file/rofalakolatelodivog.pdf In PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/160947457a4150---govinepegebidupi.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3a6a1bdac---90913241139.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/fapuwowemikotariwavo.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7a4fbb5dd---82978612954.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/9g1pjod8hbd3m1hqmo3tnsjg14/merusilomaboso.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16081f006748e1---sajoguruwugipikutofunuje.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b49e12a0747---79751692751.pdfIn PDF document text
    • https://baatco.com/ckfinder/userfiles/files/zojumomupejotanatil.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/74970170900.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16074d9c8e12be---vosilolugunezidominakorer.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/pekatoxidulalugowel.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/zixividadibo.pdfIn PDF document text
    • https://tranduongauto.com/app/webroot/files/images/pages/files/nusufakidijiwijit.pdfIn PDF document text
    • http://lalinpress.es/ckfinder/userfiles/files/tujimuk.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac3bdb5069---20732011332.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca204721dc---8540078197.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721a2ca45a7---99221599228.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd8c545bfcd---99021545812.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/84943f7598165e054e31ec4e6c9b982c/39700279233.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/winagiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=fancy+horse+stablesPDF 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_off0000ea2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2B 16908 bytes
SHA-256: f2cbf1a27d550a220d859282769e49b456a3f096744a71e42825e203857de2a8
font_01_sfnt_off00011611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11611 10464 bytes
SHA-256: 3728e3ad60705505fb69108d2860d7c7e7b55c6a0947198ee84fee0abb5676e8
font_02_sfnt_off00012dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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