Malicious PDF — malware analysis report

Static analysis result for SHA-256 8292b45a338281dd…

MALICIOUS

PDF

79.6 KB Created: 2021-09-16 22:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3d8691b99d0842642f885e2f11dcc9a9 SHA-1: ac816f9f45d45e28070e46079befa11f9be5b174 SHA-256: 8292b45a338281dd940f2ceec97d4047c828a7f99cbaeb60cd6b964bfbb7038c
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which are part of a link farm designed to obscure the final destination. The presence of a PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the malicious intent of distributing links through disposable hosting. No scripts were extracted from this sample, but the overall structure suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

Heuristics 4

  • 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
  • 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://polytex.de/sites/default/files/83951425766.pdf In PDF document text
    • https://istocdukkan.com/userfiles/files/25128205758.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/16929615187.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210913_DD0090D5C12C6E04.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/xojosimilugu.pdfIn PDF document text
    • http://sovaimm.it/userfiles/files/61418949096.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/tapemoz.pdfIn PDF document text
    • http://autoachtercamper.nl/userfiles/file/paluzesof.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/vobagelosok.pdfIn PDF document text
    • https://jager-ig.tw/up_photo/file/91103557419.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/zudowugekenonopisituze.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/jijiriwosonefomipipasupe.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161343af29b4e0---87397714765.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/penivunuxelevofuvokewoka.pdfIn PDF document text
    • http://hauptlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pevukolazitigef.pdfIn PDF document text
    • http://navigator-nsk.ru/userfiles/file/jeruvusigele.pdfIn PDF document text
    • https://holyfamilyhospitals.com/ckfinder/userfiles/files/vajubukulidixetozez.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/46563896779.pdfIn PDF document text
    • https://ubitanduk.com/contents/files/54119016402.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/51998631972.pdfIn PDF document text
    • http://vongtaygiay.net/media/ftp/file/59106012103.pdfIn PDF document text
    • http://longvu.vn/Images_upload/files/vawuxezuvovalulobefipelex.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/45882372267.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=download+hill+climb+racing+hack+apkPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE627 20696 bytes
SHA-256: a09f05b1f6d27a045e5c0cac76d995238b701fe8204c8759c227fcdc17141eaa
font_01_sfnt_off00011b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B60 10884 bytes
SHA-256: bb42117d359f4491732351ccfb4bd9a636caca4c728b4cab0391d043bf247240

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