Malicious PDF — malware analysis report

Static analysis result for SHA-256 f936a5642d902167…

MALICIOUS

PDF

66.6 KB Created: 2021-02-16 22:28:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 85f8ab05c7e95a74a22321904b84579c SHA-1: bb37a5954af9104b746948fee7ad6f1458849f16 SHA-256: f936a5642d902167d86611e1a9fda938f9fe8dcf23411ef7afcf9444433cf1d8
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI that redirects to a URL designed to mimic a search result, likely as a lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting a malicious site, potentially to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://druttle.ru/wix?keyword=neil+smelser+social+change+in+the+industrial+revolution PDF link annotation
    • http://5gusevshop.space/23325852232hty0o.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420034/normal_5ffd2bd5f0dfd.pdfIn PDF document text
    • http://mifvideo.space/70985931619fq7q9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404745/normal_60080c33c8e52.pdfIn PDF document text
    • http://psychologyrelax.xyz/jusikumowewipokizivigrp0fh.pdfIn PDF document text
    • http://cpskras.website/denosefadipunibynvwq.pdfIn PDF document text
    • http://useplafond.xyz/parufovlun6.pdfIn PDF document text
    • http://teren.fun/xovolusik2ib4b.pdfIn PDF document text
    • http://instofficial.online/reflux_treatment_guidelinesfutnl.pdfIn PDF document text
    • https://cdn.sqhk.co/juvebuzizej/jdghaIR/rush_2112_train_to_bangkok.pdfIn PDF document text
    • http://mynasert.online/86331449488e6k8m.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/feseni/98303266890.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/because_of_mr_terupt.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/magazine_background_design_template.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/free_sample_employee_handbook_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB560 5576 bytes
SHA-256: 49fb8c1148be71af6be7f447fa91970684c93785cff9d5bd838114698ff9734e
font_01_sfnt_off0000c8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8AE 5384 bytes
SHA-256: cb51f01a6232a3bf1c979bca68821a71ee5184ca4163e69278330f4e2e582283
font_02_sfnt_off0000dad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD4 9956 bytes
SHA-256: d61b34ed02f0e5a03c11b3cb769f4e633f4a2ea90eaf8f95fed77ae0cc098605

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