Malicious PDF — malware analysis report

Static analysis result for SHA-256 b19fbefd21d593ca…

MALICIOUS

PDF

75.5 KB Created: 2020-12-26 10:35:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 813a8787d36339bd27d451c89d309687 SHA-1: 1b5a06dad01b616c47d207d0e3e542f8dfe8ff9f SHA-256: b19fbefd21d593ca6021d58fc102b0f04719303b910e01c11691dde6a38d44da
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains an embedded URL pointing to 'trafficel.ru', which is likely used to redirect the user to a malicious site. No scripts were extracted, but the presence of an external URI and the overall detection profile suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=a+pal+for+gary+transcript PDF link annotation
    • https://cdn.sqhk.co/buwozumu/6ghjwgh/fcu_mobile_deposit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_5f95136752636.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/liremalo.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/juderojagubunuf.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/43023874746.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/41725980088.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/hayato_maplestory_skill_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e718398a-f9af-421c-8ffd-e1355f42c807/95171913938.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/top_bollywood_songs_of_all_time.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/receipt_template_for_google_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/76428945728.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/bootstrap_template_blog_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2d822ab-4198-454f-b66c-d7f0623c7d63/what_percent_of_uber_drivers_support_prop_22.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/selaluvo.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB76 5272 bytes
SHA-256: 48aadb74544d0bdb39d8a301f8228324682cf23a0a1cea2f351182d2c0b45253
font_01_sfnt_off0000fd8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8B 10388 bytes
SHA-256: 1cdbb514d4002068af3c3dbdc4a16694cf3ba0753a77171c656d74b04287fe06