Malicious PDF — malware analysis report

Static analysis result for SHA-256 78ab4abedd4a0c50…

MALICIOUS

PDF

73.1 KB Created: 2021-02-26 16:57:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 6f9f1f96d200570d1d3e539544b7e9cc SHA-1: f07e883382103c533cc18cabd02a68277f6a8f89 SHA-256: 78ab4abedd4a0c503f73c1a1f7d307a8d69a4627e48fa545f647810e16554828
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document body, though truncated, suggests a lure related to salary information. The presence of external URIs and link farm characteristics indicates a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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
  • 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://maypoin.ru/award?keyword=what+is+the+average+soldier+salary PDF link annotation
    • http://furofosozunonew.22web.org/sheetz_center_hall_pa.pdfIn PDF document text
    • http://setenilezodad.iblogger.org/92115298263.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464722/normal_600b6063d50c3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472486/normal_5fe4fd2ac4d10.pdfIn PDF document text
    • http://kutatit.getenjoyment.net/pagaxirusupuzazisulidi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuzuxutetug.atwebpages.com/65775610259.pdfIn PDF document text
    • http://menivafanar.epizy.com/lufowiwajewarepofagavir.pdfIn PDF document text
    • http://pesetunal.onlinewebshop.net/85653643935.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/6656662455.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/xosudu.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_off0000e1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FB 5260 bytes
SHA-256: de8cac99be4fd55ac4b88bca3fb89deb4a5b111fdc3bbfc0783425f6f5b80aa6
font_01_sfnt_off0000f3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EC 10464 bytes
SHA-256: b306cf47e87e6c1d98f4a01a0e0f348a4e61beb392feb0680f1c55037ac6adbb