Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8d80a0d92c91b41…

MALICIOUS

PDF

110.3 KB Created: 2021-09-10 10:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 83533418b06229947a86d83f29ece227 SHA-1: 753bc089656d7f657bf7ce0585f0ead8754f9e5a SHA-256: a8d80a0d92c91b4188a0c551d7e40afad148a3521e0090c5f0419b5da12e24fc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://pastadimatteo.com/ckfinder/userfiles/files/43240256741.pdf In PDF document text
    • https://behbehaniprojects.com/uploads/files/narobe.pdfIn PDF document text
    • http://ibnuaffan.com/ckfinder/userfiles/files/98836516830.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021090603574173499.pdfIn PDF document text
    • http://makrostal.pl/user_images/file/75125889481.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/modepurasaf.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/zezijuzeziraxas.pdfIn PDF document text
    • https://tefen67.com/userfiles/files/nidefisogojudopopizubep.pdfIn PDF document text
    • http://tizianaiberti.it/userfiles/files/15732242856.pdfIn PDF document text
    • http://khonggianmang.com/upload/files/gunakutipijexad.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/gesenimiku.pdfIn PDF document text
    • http://pmrs.ps/userfiles/file/putonab.pdfIn PDF document text
    • https://jmtours.co/aym_image/files/69144540949.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613a422cb91cf---pibijexoza.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/53172673836.pdfIn PDF document text
    • http://home-hj.com/up_photo/file/74982805939.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a6f08dc7d---wosafetapot.pdfIn PDF document text
    • http://ambvetesopo.eu/userfiles/files/55383362479.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/newuzarimabimezotiwowol.pdfIn PDF document text
    • https://e-midas.ro/files/file/47944227229.pdfIn PDF document text
    • http://granitemountainranch.net/userimages/85001000395.pdfIn PDF document text
    • http://hak-al.com/resimler/files/20255269038.pdfIn PDF document text
    • https://cqhuaan.myhost360.cn/upload/files/09-04-06-31-32-21.pdfIn PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/40694544845.pdfIn PDF document text
    • http://maginsaatmetal.com/resimlerfiles/tirivadu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=adobe+camera+raw+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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14965 19316 bytes
SHA-256: 303d6a72ad20f3ee511d9a7ba0a55993289a2164d39d2d4466a7554c2c150f3d
font_01_sfnt_off00017b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B6E 10428 bytes
SHA-256: 26cd52a2fe36050ce3e715be6e67baf9f2b9eb30a702f146c419cfba853d4e30
font_02_sfnt_off0001930b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1930B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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