Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9ca9e2ddb4b15e…

MALICIOUS

PDF

76.3 KB Created: 2021-02-17 13:42:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 07f43f53e2b9534729f6af5116e2af5f SHA-1: 96f09807e3c77eeb994e90efe7026189e73db0b6 SHA-256: bb9ca9e2ddb4b15e661e832bacf92dc64616bf08ab6f40d8732ee3182efba8b6
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of phishing or malware distribution. The ML classifier and ClamAV detection further support the malicious nature of the file. The embedded URL likely serves as a lure to download a secondary payload or redirect to a phishing site.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wix?keyword=briggs+and+stratton+550+series+pressure+washer+manual In PDF document text
    • http://blacktea.space/dipuzupazojazetonof5z2p4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386842/normal_5fc72e67e4dc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454808/normal_6010cb65d3211.pdfIn PDF document text
    • http://ueuniti.xyz/demolition_derby_2020_texastpkd4.pdfIn PDF document text
    • http://znakomstva69.space/digno_eres_de_gloria_letra_rey_de_reyeso6x0j.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/rawesaragegugar/12851475941.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/easy_budget_spreadsheet_app.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/gujitamijonefeja.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/powerdirector_pro_version_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/2012_audi_a5_convertible_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/13777245097.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/bitstream_vera_serif.pdfIn PDF document text
    • http://bimemulu.rf.gd/technical_report_writing_coursera.pdfIn PDF document text
    • http://sijelufuzarolup.epizy.com/evaluating_functions_worksheet_algebra_accents_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/sizekazesezi.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/mazivukuzide.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/yowhatsapp_latest_new_version.pdfIn PDF document text
    • https://s3.amazonaws.com/bamepofewalada/71572867028.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_off0000eca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA3 5780 bytes
SHA-256: ac53db6685cecc9c13f4d5029c3df7554cead41714f0a70dbbcf0202afd2a2ab
font_01_sfnt_off00010036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10036 10336 bytes
SHA-256: 25db64cbf85a7245fea6a34a11af622e8d713545b02cc5504e77034cc1dc0cca

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