Malicious PDF — malware analysis report

Static analysis result for SHA-256 133b5a4245e75e14…

MALICIOUS

PDF

81.4 KB Created: 2021-03-16 02:15:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8521a7b73f8076bda056e79077a3bff3 SHA-1: 23e551543051a0afebec268752978d44cea82d28 SHA-256: 133b5a4245e75e1433d03408242d8d02aed2710f763fe43ae28b806a02e9ea67
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL designed to appear as a search result for a health-related query. This suggests a phishing or social engineering attempt to trick the user into visiting a harmful site. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://yafferge.ru/wix?keyword=what+happens+if+you+kiss+someone+with+mrsa In PDF document text
    • https://cdn.sqhk.co/guviterolovu/ciijHgi/vavanefavasekugonifibimum.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/how_to_find_the_slope_of_a_parabola_given_two_points4jdtb.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/vhhcXig/80941243730.pdfIn PDF document text
    • http://xinonujez.iblogger.org/garmin_approach_s10_review.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/tuwusitopumemesomujewe2bjv6.pdfIn PDF document text
    • http://namelesssouth.xyz/should_massage_therapists_wear_masksgdhrk.pdfIn PDF document text
    • http://naturalik.fun/33445590123c153i.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/fifuto/percy_jackson_hardback_box_set.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/ffx-_2_fiend_capture_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8742e816-d66e-4efe-96e2-187dd3ae8253/10305842290.pdfIn PDF document text
    • http://notaruk.rf.gd/64284450799.pdfIn PDF document text
    • https://s3.amazonaws.com/pajukovuxetu/7071186661.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a04e224f-9306-4e0f-b213-e6fba015a04f/hp_deskjet_2544_wifi_setup.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/define_gaming_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/balancing_equations_worksheet_w_301.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/transformers_animated_barricade.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/9915969969.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/international_migration_report_2017.pdfIn PDF document text
    • http://giwolexuki.rf.gd/mixalusakowamefafajadivaw.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_off00010205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10205 5380 bytes
SHA-256: ac234c5cf18e1b07f514badc429fbf2840b153a5103421d3d21e1cc7063924fa
font_01_sfnt_off00011449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11449 10468 bytes
SHA-256: 46836ed649db722ce97381b9f9fbac2f7d594d3930ba0905dd5933af0b96c0f6

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