Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b125c8e4762e13…

MALICIOUS

PDF

71.3 KB Created: 2021-03-28 16:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2a326492b5bb638f243f1d4218510902 SHA-1: 44231e5557b7a6248d0e6b15a679258cf0e14252 SHA-256: 47b125c8e4762e1346d91a88b8501e447b7e824769d26cc59e1d1e14d5dad707
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains references to file conversion, and numerous external URLs are embedded, suggesting a phishing or malware distribution lure. The presence of external URIs and the link farm heuristic indicate the document is designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/123?utm_term=convert+a+pdf+to+a+excel+spreadsheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464313/normal_5fd093d041766.pdfIn PDF document text
    • http://fadopaduwovod.iblogger.org/74734192128.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488314/normal_5ff255a34c160.pdfIn PDF document text
    • https://cdn.sqhk.co/wesuwajil/Y0hg9je/art_therapy_salary_payscale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425506/normal_5fdb537ceae84.pdfIn PDF document text
    • https://cdn.sqhk.co/posiraki/u6jeMXr/vikomojusatibunav.pdfIn PDF document text
    • https://waxosutuj.weebly.com/uploads/1/3/1/4/131437699/4091103.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443342/normal_6004dcb3cfcd9.pdfIn PDF document text
    • http://loduxoxoba.22web.org/pemanubigusirolupiruta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467032/normal_60089bb58c5d1.pdfIn PDF document text
    • https://piximemob.weebly.com/uploads/1/3/4/3/134371032/leboxajevefuwi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tabikobi.epizy.com/bobikufaj.pdfIn PDF document text
    • http://varosuvavim.epizy.com/90117093186.pdfIn PDF document text
    • http://bifagogop.epizy.com/68963050717.pdfIn PDF document text
    • http://purukalalud.epizy.com/2005_ford_6.0_rebuild_kit.pdfIn PDF document text
    • http://vuriruzuminomu.epizy.com/bokuvaj.pdfIn PDF document text
    • http://sufapanizesemot.epizy.com/taziwexosagewotetubuzuwoz.pdfIn PDF document text
    • http://fokezazonof.epizy.com/internet_adalah_gudangnya_informasi.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_off0000d903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD903 5276 bytes
SHA-256: b143ac68cf8231a05bfb4d6e05b2821c3d86603505175e2e40f5fd76fc3fb23e
font_01_sfnt_off0000eaf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF6 10780 bytes
SHA-256: 011cc77e4f9c58783d1a2eb024c4d0d4a000e2ea0e074555d30811b6dda30780

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