Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9c3cf001da3501a…

MALICIOUS

PDF

82.9 KB Created: 2021-09-11 03:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2a6340f1a1fb870d753fd802f3344197 SHA-1: 40f366ce028e65fe302287f9306dda46844bf303 SHA-256: d9c3cf001da3501ab15cd4c07644d6f01ffd792b5d935688ddf630644acc00b2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a link farm with numerous distinct hosts and embedded URLs. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a high likelihood of this document being used to distribute malicious content or phish for information by directing users to external, potentially compromised, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://rayanchem.com/d/files/xududigalowejibom.pdf In PDF document text
    • http://mywayrtk.org/userfiles/file/nozonilawigunaba.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/gudenabeme.pdfIn PDF document text
    • http://nato-denkmal.de/uploads/file/70769210253.pdfIn PDF document text
    • https://wic-net.com/userfiles/file/95569787232.pdfIn PDF document text
    • https://tjpapigroup3.com/contents/files/12950754431.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/bigipapanux.pdfIn PDF document text
    • http://locthanhroyal.com/upload/files/bujuxirarijejofaxobogofiw.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/41575149372.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/5234127971.pdfIn PDF document text
    • http://helloslow.com/data/userfiles/files/sinuj.pdfIn PDF document text
    • http://techsystem.gr/data/uploads/ckeditor/files/dewojajugutazovefasuwa.pdfIn PDF document text
    • http://www.icareonline.net.au/ckfinder/icare/files/43759854623.pdfIn PDF document text
    • https://christianklein.eu/Quansis/ckfinder/userfiles/files/zusanunar.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138137bb46ad---losudanuwigikefezusumev.pdfIn PDF document text
    • https://jck.ro/userfiles/file/60543742413.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/lonolafemu.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/damikuzi.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/rawarikukarumo.pdfIn PDF document text
    • https://havilahbuilders.com/userfiles/file/42178305278.pdfIn PDF document text
    • http://erex.hu/upload/file/92009641758.pdfIn PDF document text
    • http://ekvatorbl.com/userfiles/file/dixepitipowevix.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/40042971264.pdfIn PDF document text
    • http://kurier48.pl/files/userfiles/file/bewolapunudutupigabiza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=skate+game+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_off0000e3d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D3 16672 bytes
SHA-256: fcf28fe033782f19c376ba54f3bad98580f6bcb5328f3d26532822cb9784c7bd
font_01_sfnt_off00010ecd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E4 10544 bytes
SHA-256: 70c88004de086347d7357161b744f53266e512c7889010d359817865a812e648

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