Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2577afee45eb408…

MALICIOUS

PDF

66.8 KB Created: 2021-09-30 11:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 005c0895a8e5e565cf8546f99863f053 SHA-1: 901a4319c659803c9f4c3e9ad1f1e0f4823d92db SHA-256: d2577afee45eb4086036d4170d9e9b3df010dbdec152032eb933c4f645dc9c36
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm on disposable hosting. Multiple embedded URLs point to various domains, suggesting an attempt to distribute malicious content or phish for credentials. No scripts were extracted, but the overall structure and heuristic firings strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 https://irastuff.com/admin/ckfinder/uploads/files/tapimoduromijafeb.pdf In PDF document text
    • http://botosani.ro/img/uploads/file/mukotabotobevabasurada.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/57483596161.pdfIn PDF document text
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/81396984870.pdfIn PDF document text
    • http://degrossier.nl/uploads/file/desemofuvo.pdfIn PDF document text
    • http://fecirturizm.com/resimler/files/60931942210.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/fegabusiwegibaresepinara.pdfIn PDF document text
    • http://miyagi.chi-kara.net/Upload/files/voborimo.pdfIn PDF document text
    • https://oxfordjsr.com/userfiles/file/zulejanikufogilusuk.pdfIn PDF document text
    • https://morabia.fi/images/file/92133884706.pdfIn PDF document text
    • http://thewesternmist.com/userfiles/file/xebukosizetenitulawomofut.pdfIn PDF document text
    • http://giorgimpianti.com/userfiles/file/96034795002.pdfIn PDF document text
    • http://montex.pro/uploads/userfiles/file/89183500667.pdfIn PDF document text
    • http://belloverde.net/emailer/file/53145837340.pdfIn PDF document text
    • https://kuepancong.com/contents/files/39581349540.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/7091328071.pdfIn PDF document text
    • http://yuhuimachinery.com/d/files/17733794271.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=symbian+emulator+for+android+apkPDF 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_off0000a717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA717 14940 bytes
SHA-256: bf418003caba0e13b97617594990356d65bd87de7c69463d2303435d801d4cd4
font_01_sfnt_off0000cce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4FC 11012 bytes
SHA-256: eb3c339dbaff491374ff42f8c530439aee2df3227d5efb95bcdfbda2fe80f8a3

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