Malicious PDF — malware analysis report

Static analysis result for SHA-256 09194f94b14fb038…

MALICIOUS

PDF

80.4 KB Created: 2021-09-18 18:37:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: a3d05968efb5cbc677d76e1224574fb7 SHA-1: 00d454e3de08923fbf7a263759eada1f0d534a54 SHA-256: 09194f94b14fb038e0178c21481ecb3c15e963c3416c9c4d0a1adbc1bb51bb6c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the numerous extracted URLs suggest a link farm designed to redirect users to potentially malicious sites. Although no scripts were explicitly extracted, the nature of the PDF and the link farm heuristic point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://sweethomedelivery.com/ckeditor/ckfinder/core/connector/php/uploads/files/51880415501.pdf In PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/gatetidefetegezased.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/27384600886.pdfIn PDF document text
    • http://www.gobarging.com/uploads/textareas/file/85061043908.pdfIn PDF document text
    • http://tc-antey.ru/uploads/files/leputekokugezazadu.pdfIn PDF document text
    • http://www.gobarging.com/uploads/textareas/file/44347650675.pdfIn PDF document text
    • http://machulski.com/public/file/10363443077.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/55032357170.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/darolagelivodolo.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/bizevefozit.pdfIn PDF document text
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/wubukegakizugosaboko.pdfIn PDF document text
    • https://soi.icami.mx/ckfinder/userfiles/files/78353743473.pdfIn PDF document text
    • http://studiocalderini.it/userfiles/files/sosefenil.pdfIn PDF document text
    • http://kechengchem.com/upload/files/votopeg.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/35243686998.pdfIn PDF document text
    • https://hoya.hr/UserFiles/file/4818944879.pdfIn PDF document text
    • http://msiutilities.biz/documents/65314080901.pdfIn PDF document text
    • http://evolutionchonburi.com/userfiles/files/23236746998.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/woxuboxomifunibim.pdfIn PDF document text
    • http://haiphongcontest.com/images/files/40229343352.pdfIn PDF document text
    • https://millvalley.com/wysiwygfiles/file/nutif.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/18667375535.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=sdmoviespoint+hollywood+latestPDF 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_off0000d60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60A 17348 bytes
SHA-256: b1184c1e7496da118548b0573aaf9cd4a2a0ef111275d5a9e3fb0f4ed5c63edc
font_01_sfnt_off000102ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102EC 10900 bytes
SHA-256: dd6aae1afc6564650e564bfa2d5969e3b285c65ede2c003d74b12752d5a45c7e
font_02_sfnt_off00011c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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