Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f97bd11b0fc989…

MALICIOUS

PDF

70.3 KB Created: 2021-02-13 03:07:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: dbc351215c8c64ac08fe9f8577de6bc7 SHA-1: 89a836450b620620bddbb4514e78a439be0af80e SHA-256: 22f97bd11b0fc989d92cdb29154f164f7c76137bdfb23eb59b23b231b4c00453
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware or visiting a phishing page. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest a common phishing or malware distribution technique.

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://jacksth.ru/wix?keyword=clinical+coding+workout+2013+with+answers+book PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4456393/normal_5ff097d4aaf89.pdfIn PDF document text
    • http://worldhold.online/salawerowelixelugatiyv5jw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453560/normal_5fc8732cc992e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_601fc9849d061.pdfIn PDF document text
    • http://poradoit1.site/free_online_business_flyer_templateswfwab.pdfIn PDF document text
    • http://runolive.com/options_futures_and_other_derivatives_10th_edition_solution_manualf1pgw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365560/normal_5fd69b29965fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_5fe7ec03da860.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/vonutavekip/85513553725.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/certificat_de_conformit_traduction_en_anglais.pdfIn PDF document text
    • http://rajiwewovipu.epizy.com/dcms_logo_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/87252901020.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/wuxefedu.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/bubble_bobble_double_android.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/80879916965.pdfIn PDF document text
    • http://jeleruvimubag.rf.gd/a_thousand_years_piano_chords_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/zifupevigugazasezizakivef.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_off0000c7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D3 5892 bytes
SHA-256: d104fa8b12f1cf382f4cf42d133dc0dd342ad1512e3f4b0e15b67528e6527e4e
font_01_sfnt_off0000dbdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDC 10044 bytes
SHA-256: 302e1614b0b0314a2460d2fdfc65984fdde8839572db8fb0f4238b51d357f3f5
font_02_sfnt_off0000fe0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0B 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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