Malicious PDF — malware analysis report

Static analysis result for SHA-256 b958a7f9454fc813…

MALICIOUS

PDF

81.1 KB Created: 2021-03-30 14:15:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8883d974caf722b1dc76d86de96473ae SHA-1: 43a41496f08696aaecc26e5b277a81c501781946 SHA-256: b958a7f9454fc813514ab1af02a8ac91b5807720ec3a9ec419dd85522d001b66
96 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 a machine learning classifier indicated a high probability of maliciousness. The document body, though partially corrupted, contains text related to a search query, and an embedded URL points to a suspicious domain, suggesting a phishing or credential harvesting attempt. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a malicious intent to redirect the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/aws?utm_term=how+much+water+goes+in+a+presto+pressure+canner PDF link annotation
    • http://kolekewoni.mywebcommunity.org/96215786059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421039/normal_6013a9d616529.pdfIn PDF document text
    • http://fafikup.scienceontheweb.net/cards_against_humanity_expansions_in_order.pdfIn PDF document text
    • http://wovoradomumakil.medianewsonline.com/que_significa_fotografia_aerea.pdfIn PDF document text
    • http://wotimose.getenjoyment.net/baxerejobubuwejafomev.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/around_the_world_in_80_days_movie_review_2004.pdfIn PDF document text
    • http://juxowupekabaf.mygamesonline.org/21806862204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466146/normal_601c7dcd286bb.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/farowug/does_google_chrome_comes_with_adobe_flash_player_blocked.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/jasper_reports_parameter_set.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/livoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da2753ed-40e1-40dd-8d22-a33c2800cca0/bowonamas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72a65a84-4a11-4441-8446-07599f2949d1/63071332265.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/innisfil_weather_report_hourly.pdfIn PDF document text
    • http://movuzawizigevej.myartsonline.com/zogim.pdfIn PDF document text
    • http://rolubumemetujin.atwebpages.com/pifafilutare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23cba9b7-e5dc-47ff-acd7-9d3bb6acccbd/how_to_conduct_security_impact_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/adventures_of_tintin_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7178080-e4c7-403e-87e8-ad3965de741e/24530141182.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/pavewiwatenep.pdfIn PDF document text
    • http://lobopekogolo.onlinewebshop.net/world_of_darkness_slasher.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/adobe_animate_free_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/pikonisuz.pdfIn PDF document text
    • https://s3.amazonaws.com/luworizesupox/jikukajis.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_off0000feb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 5368 bytes
SHA-256: 040133afe8c010fdc22f91f204042db5c6cb97d5447fb537ab166b60c35f9ac2
font_01_sfnt_off000110db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DB 11296 bytes
SHA-256: 43f487724353d7ec5a1e9a1da8e88da1822c2f08461741cd98317333d799d882

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