Malicious PDF — malware analysis report

Static analysis result for SHA-256 d18276cf104a4af3…

MALICIOUS

PDF

83.8 KB Created: 2021-09-17 11:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e58d8604af94c5c0d0c222366011f7b7 SHA-1: 267e0f63c08fa599f296e1fb024be7b50cd9c931 SHA-256: d18276cf104a4af3b5e6dde039119a69fead42ac6f4574b8f6642ae36cf21aaa
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML and ClamAV as malicious, with ClamAV identifying it as a phishing trojan. The presence of embedded JavaScript and a large number of external links, many pointing to potentially disposable domains, indicates a phishing or credential harvesting attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/be3ad2208dd6eda5889d8424dd521028/nebutuxaliba.pdf In PDF document text
    • https://angkalaris.com/contents/files/vujulolatadosefebe.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/28300438721.pdfIn PDF document text
    • https://rotitelor.com/contents/files/42262885721.pdfIn PDF document text
    • https://duproject.com/uploadEditor/files/53226796237.pdfIn PDF document text
    • https://echipamente-scule.ro/userfiles/file/zakikuju.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/xizenenaliwafajalozapawog.pdfIn PDF document text
    • http://robotsuk.com/luckingbros.co.uk/userfiles/files/tukol.pdfIn PDF document text
    • http://ckudzcssffhhj.handysociality.com/upload/files/wofukasutazed.pdfIn PDF document text
    • http://chinalabware.es/d/files/34072606313.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/xawamifofifepexavegubujex.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/18207870179.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613838180143e---fulodopidukodidufuma.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/33023144942.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/31543355375.pdfIn PDF document text
    • http://hoachattn.com/image/files/81764969874.pdfIn PDF document text
    • https://sooryasales.com/uploads/file/gowobemaregogarolerisiwoj.pdfIn PDF document text
    • https://codefon.hu/js/ckfinder/userfiles/files/vojafisokinidudig.pdfIn PDF document text
    • http://ledspectrumthai.com/ckfinder/userfiles/files/pusuzogajenugaxofofugura.pdfIn PDF document text
    • http://www.dereformasenalicante.com/archivos/files/76666463782.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/49865338548.pdfIn PDF document text
    • https://ka-base.no/images_students/files/luwebulajekuveketomepok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=convert+json+to+java+object+using+gsonPDF 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_off0000e3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fbc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC4 16944 bytes
SHA-256: c2daef4b57eab29f426821e311380a23f392dd24004319d0eaf3e8a80cbce843
font_02_sfnt_off00012831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12831 10824 bytes
SHA-256: f6503172f5e2cfce2de8bfb71760a017de0cdb5a68c483e7c4b7a2369621da75

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