Malicious PDF — malware analysis report

Static analysis result for SHA-256 9182d325af7888c7…

MALICIOUS

PDF

71.1 KB Created: 2021-03-10 00:35:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8c0945a442149e839ed2c19a23205ad2 SHA-1: 3457bed967033bacc10cf96ad742035f03c1f250 SHA-256: 9182d325af7888c7afd172d6034da4d43fd3114e2a6faac6759cc55bf98ba3ab
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure and embedded links suggest an attempt to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dafemum.ru/123?utm_term=chunariya+lehrayi+video In PDF document text
    • https://cdn.sqhk.co/sawibevas/Ojdhehg/live_nation_drive_in_concerts_uk_cancelled.pdfIn PDF document text
    • https://cdn.sqhk.co/rinugezig/jfie76j/kingdom_business_fellowship_bismarck_nd.pdfIn PDF document text
    • https://rusiwenul.weebly.com/uploads/1/3/5/3/135327855/joxarabafidu-bijadenesobuko-nejozabamak-zivuximatinur.pdfIn PDF document text
    • http://nebo-baikala.ru/molyslip_copaslip_msds_sheetxg1mn.pdfIn PDF document text
    • https://tigibivimibi.weebly.com/uploads/1/3/4/3/134344299/5840903.pdfIn PDF document text
    • http://koolmaxt.online/fesogegoraxesodiselesuqlg40.pdfIn PDF document text
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/gojofefebuxuwe_jolaze_sinoro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_dfafe98102174a5389f800a157db2847.pdf?index=trueIn PDF document text
    • https://bc732cde-fb09-4fee-8ab5-c82a45a1131b.filesusr.com/ugd/2ac701_28acc7a9de444f3690185ecae097cb5e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/transformers_autobots_arrival_to_earth_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/48349981322.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/bouncy_castle_android_tutorial.pdfIn PDF document text
    • http://petirepure.epizy.com/ez_go_golf_cart_battery_charger_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/61907386281.pdfIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_af1e15e3cbde48a8b70d9f4157a4cd9c.pdf?index=trueIn PDF document text
    • http://jizozekawa.epizy.com/dodajagenuxofus.pdfIn PDF document text
    • http://sasezer.rf.gd/vodonisabafufos.pdfIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_0c66ae0c680744d58a7a63d9750ec982.pdf?index=trueIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_5d0d862d4fe146149f115b76d1d29149.pdf?index=trueIn 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_off0000d810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD810 4804 bytes
SHA-256: 475d419558fb2e3da96cda22cf042593a49607b22766c2c72eee9535d6404da7
font_01_sfnt_off0000e861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE861 11160 bytes
SHA-256: e60ad2c8a1e6fdf20406012a73a93255b43a1fdf6af0fbb22fcf71f800c69105

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