Malicious PDF — malware analysis report

Static analysis result for SHA-256 774b4724e6d887b3…

MALICIOUS

PDF

80.3 KB Created: 2021-09-23 08:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8e1f2901f57620e380541b603adfd56b SHA-1: c2ad3c81d0330c84af3735eab7847328c41b636c SHA-256: 774b4724e6d887b3fec36063f35cf9bfdcb8f51fd1105b775fd94cff6d6706a0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, suggesting it functions as a lure to redirect users to potentially malicious websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm on disposable hosting, commonly used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://cructi.ru/uplcv?utm_term=mazes+and+more+apk PDF link annotation
    • http://christ-china.com/filespath/files/20210901101807.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/wutakimotib.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135067dbc0a3---vunimuwenopoxabigosonifow.pdfIn PDF document text
    • http://tribo.kz/userfiles/File/90279939987.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/jowidodosutafofek.pdfIn PDF document text
    • http://anhhieu.vn/hinhanh/file/55541938776.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/b0ec57e0f776b7b71468266c3786afae/bamalilus.pdfIn PDF document text
    • http://dsraxys.com/uploads/35855142202.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/talewinuzotemifobewowoteb.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/87758368551.pdfIn PDF document text
    • http://hidrometa.com/images_upload/files/fibadosikivo.pdfIn PDF document text
    • http://hodori247.com/uploads/files/wufipodazub.pdfIn PDF document text
    • https://cemb.ca/upload/editor/file/pasugofapabasoxuduzemek.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/71421759725.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/wokolozepu.pdfIn PDF document text
    • http://insei.eu/userfiles/files/64476909390.pdfIn PDF document text
    • https://www.natursany.com/ckfinder/userfiles/files/40299631256.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/25887076493.pdfIn PDF document text
    • https://xuongkhopbadinh.vn/images/files/82601985765.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/wugadij.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/wuzeladujapinal.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/23532661567.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/57357712948.pdfIn PDF document text
    • http://buydecor.ru/uploads/files/51970738308.pdfIn PDF document text
    • https://recrut.com/files/files/dadilotemokeliratuj.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_off0000d09e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD09E 19380 bytes
SHA-256: 0cc685f272ce5c06602dc9e35f3c177615346c8953a1787eaa27f94f71a5c42a
font_01_sfnt_off00010404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10404 10464 bytes
SHA-256: 7226de2d3fc366eae005cfd8388755b40157d86fb5ead5f1a7572e002f0c2a44
font_02_sfnt_off00011bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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