Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dbceee02f829f6f…

MALICIOUS

PDF

78.3 KB Created: 2021-09-19 00:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 73fd06ffd46ca7c8109895a7d2f90c03 SHA-1: e00a30e1521be5aa4d345bed122254740e4c1152 SHA-256: 9dbceee02f829f6fd5dc485d3cf096e8e9c0a828e1ffb92c759382ec17cba0b6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to phishing sites or download further malware. The PDF structure itself is also indicative of a link farm designed to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://telorgabus.com/contents/files/milalonitivelafolunegaz.pdf In PDF document text
    • http://patanamachine.com/imgUpload/files/29973451711.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/9926803880.pdfIn PDF document text
    • https://tebra.si/userfiles/file/49089435938.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/fiposareleledunugob.pdfIn PDF document text
    • http://bobmeetin.com/media/galleries/files/jiwaligi.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/91332124744.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcde6553c9---sabulasig.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/narutaparegokezasit.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/1613979291.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/13310321143.pdfIn PDF document text
    • http://ccsctda.com/ckfinder/userfiles/files/20210913_095037.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16145cda04cf42---lubozavaf.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/48030953795.pdfIn PDF document text
    • http://www.jobibon.com/admin/userfiles/file/2296413058.pdfIn PDF document text
    • https://gdaniec.com/upload/files/78293294143.pdfIn PDF document text
    • http://leasingtowers.com/ckfinder/userfiles/files/tivosilosenurogirubod.pdfIn PDF document text
    • https://keluargamimpi.com/contents/files/danadulimonatuwuteb.pdfIn PDF document text
    • http://tuzoltosagmihald.hu/userfiles/file/22112292123.pdfIn PDF document text
    • https://carolinevlieghe.fr/images/file/fofasonafik.pdfIn PDF document text
    • http://naszemotyle.natura2000.pl/imgturysta/files/juwinipusaxuzurobuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=counter+strike+source+wallhackPDF 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_off0000cd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD27 10636 bytes
SHA-256: a9c57567a4636f69f98232bd55461f4d06446aa2d459a75d3e19cc03a5e0c6d9
font_01_sfnt_off0000e594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE594 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA6 17816 bytes
SHA-256: a4aa9df8ebe1371859d215dffd9d8db6dfed6b606312a7fea367abedaf04582e

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