Malicious PDF — malware analysis report

Static analysis result for SHA-256 d014f5e82c16d42c…

MALICIOUS

PDF

80.5 KB Created: 2021-09-13 02:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bc45b119738261f831fb62b4a04d03c6 SHA-1: 55ae1e8821ff9cfa729e548e46ecbdcb4722c293 SHA-256: d014f5e82c16d42c12ca5e828c3cfffae897c1fabdc081e0a50b8596e180f3cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of 'utm_term=download+fifa+21+mobile+offline' in one URL indicates a potential lure for pirated software or game downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://pixomot.ru/uplcv?utm_term=download+fifa+21+mobile+offline PDF link annotation
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139199245f2c---vonurixibazudegofomegiw.pdfIn PDF document text
    • http://oecschool.com/userfiles/file/poxati.pdfIn PDF document text
    • http://samtle.net/ckupload/files/wobatalularazijuwumasiku.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/11989104883.pdfIn PDF document text
    • http://rapet.hu/files/29210462763.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/lobovireruneposexibiku.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/liwajaziba.pdfIn PDF document text
    • http://sinsg.com/files/fckeditor/file/68093926793.pdfIn PDF document text
    • http://ctkupavna.ru/upload/file/61426691109.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/72516531718.pdfIn PDF document text
    • http://321eastern-thailand.com/userfiles/files/durexesowaxurozekimawim.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/vagudabofikewugonewaluniw.pdfIn PDF document text
    • http://seoaudytor.pl/userfiles/file/lepavoxigulimipa.pdfIn PDF document text
    • http://gabident.pl/local/userfiles/file/42542243037.pdfIn PDF document text
    • https://stka.gr/ckfinder/userfiles/files/fotureripazewodod.pdfIn PDF document text
    • https://siriusdynamics.com/assets/uploads/files/boximu.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/finekiforudowobazu.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/5b8b900f62fdb7bc0c9e8752192ad53d/32883918893.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135cc3332a4c---97800963889.pdfIn PDF document text
    • http://yejida.com/userfiles/file/moxatorizijofuxanekujuvo.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1612ef426ca530---zepibisivonipu.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/23509199075.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0921aba66---tadenunuduxifubejelag.pdfIn PDF document text
    • 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_off0000d747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD747 17404 bytes
SHA-256: 72c7fef2d758766e71417295e50aa0055fc1c575f238a74b999f7a3dcfb2f9b7
font_01_sfnt_off00010409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10409 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C20 10548 bytes
SHA-256: 5061e0cdb228f9b67687c32ac5d91184b90c8961c09ee5cf23a788e3837f6bee

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