Malicious PDF — malware analysis report

Static analysis result for SHA-256 d55be98e0b06ab94…

MALICIOUS

PDF

74.2 KB Created: 2021-03-03 15:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 35c657e2079b327febbab5323fe48714 SHA-1: bea971b33b9fb5afe48ed6dce06d5bd738dd0a94 SHA-256: d55be98e0b06ab9481627df1bd23e9407c47cec596ff892eb18a3eb09383bb94
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a malicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, suggests a lure related to fishing, which is likely a pretext to encourage users to click the malicious link. The presence of external URIs and the ML classification strongly indicate a phishing or malware distribution attempt.

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://midufefew.ru/123?utm_term=how+to+rig+mullet+for+redfish PDF link annotation
    • http://luxomozuk.mypressonline.com/majorejexafelebenix.pdfIn PDF document text
    • http://magnitoli-2ekran.site/how_to_pair_blue_parrot_450_headsetdci8x.pdfIn PDF document text
    • http://xiwikene.iblogger.org/12622995577.pdfIn PDF document text
    • http://mebovedu.getenjoyment.net/gudibot.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/45071155025aphrx.pdfIn PDF document text
    • http://kefudepoduwudi.sportsontheweb.net/94939446607.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/how_to_write_measurable_goals.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/xamibebulosaxug/medical_surgical_nursing_salary.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/30518176653.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/44553409337.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/chasing_amy_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/transunion_credit_bureau_request_form.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/whatsapp_apps_pc.pdfIn PDF document text
    • http://wuzunura.rf.gd/82303034376.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/the_land_of_stories_the_enchantress_returns_reading_level.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_off0000e601.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE601 5164 bytes
SHA-256: 50e1479b04c51482d37a53b0f03dc2d360f0e5236d060c529d8831c6bc6ab467
font_01_sfnt_off0000f77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77C 10548 bytes
SHA-256: 689a5a09d0d8fcd84555f583af17bb3b455484dff828fe4eda4f16263b180b94

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