Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bd58f778106032…

MALICIOUS

PDF

77.2 KB Created: 2021-09-18 05:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b44ed99b4f36d7518098a182e3cce476 SHA-1: 1bc4145af7d13683148cee5ecd0541b4e594a542 SHA-256: 74bd58f77810603206a8cf3ea6e69ce752526aa94424a4fd69da8d674f2c6639
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The 'SE_MFA_LURE' heuristic suggests it's designed to harvest credentials or abuse multi-factor authentication by prompting the user to click a link. The document body is unreadable, but the presence of numerous embedded URLs, many pointing to PDF files on various domains, supports the phishing lure attack pattern. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://lotusburbank.com/uploads/files/wixirozub.pdf In PDF document text
    • http://abwcolley.com/uploads/files/jonibudutoxarife.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/mutotopijes.pdfIn PDF document text
    • http://tagsu.com/attachments/fckattachments/file/27783210697.pdfIn PDF document text
    • http://www.sandipmallick.com/fckimages/file/dixisibuvibotizonugo.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/bevomam.pdfIn PDF document text
    • http://stefanourso.com/public/userfiles/file/dapifonorusot.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/68491626266.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/59353366417.pdfIn PDF document text
    • http://ppogrimall.com/upload/editor_image/file/rasefusefet.pdfIn PDF document text
    • http://tid.vn/upload/files/49891236314.pdfIn PDF document text
    • http://topoint.cc/userfiles/fckFile/20210909094458.pdfIn PDF document text
    • https://nakatarikaszel.pl/app/webroot/userfiles/file/dubar.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1613e11df047a3---ladorivifozutasovejeba.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/34823858132.pdfIn PDF document text
    • http://mdcegy.com/app/webroot/img/fck/file/32868002804.pdfIn PDF document text
    • http://eiak.org/upload/editor/files/55444402346.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/87207106260.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/sifofofetedaxuriz.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/87245394869.pdfIn PDF document text
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/69106901642.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+restore+deleted+phone+numbers+on+androidPDF 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_off0000c81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC81C 10972 bytes
SHA-256: 27ce347d198d94be261b4c2f1ac84c25abe3c87e8fbb57fd15a8b9113673de0f
font_01_sfnt_off0000e122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 17800 bytes
SHA-256: 79ef93bc4dc0a0070ab8385126c228d6c57097e453bf037c5e22e6f6140f3503
font_02_sfnt_off00010eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.