Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb586e58a29b902c…

MALICIOUS

PDF

80.2 KB Created: 2021-01-04 18:50:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 78f94adddd2515cd18452bea318bc056 SHA-1: 72c327fccf927ba5dd851f15cc45d9a650630667 SHA-256: eb586e58a29b902c690a3d3c4dc80027cfcc59d990ea9f38360b26cc357364cc
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the PDF structure suggest an attempt to lure users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/aws?utm_term=sarkari+result+ctet+answer+key+2019 In PDF document text
    • https://cdn.sqhk.co/mujexoxa/jjnjaij/fuvexunifudolijedalinel.pdfIn PDF document text
    • https://zorisurirumu.weebly.com/uploads/1/3/4/6/134600588/44d6f2a5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471688/normal_5fd818e0626bf.pdfIn PDF document text
    • https://cdn.sqhk.co/sorifalemuj/snKyjaL/gutschein_media_markt_online_shop.pdfIn PDF document text
    • https://molozotupinomel.weebly.com/uploads/1/3/4/3/134340336/366842.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/33f9bd52-b4b7-4af6-b385-80f25e4a3851/o_que__a_desordem_mundial.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/vampire_weekend_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/ascaris_lumbricoides_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/tata_sky_app_play_store.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/bilopibasuvokijobu.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/half_ticket_all_songs.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_off0000f0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E7 5636 bytes
SHA-256: 9e138fd996bad08c98ca8af71db23d8fd88bdbfb8c39ccb88ee36616adb9dae1
font_01_sfnt_off0001043c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043C 1936 bytes
SHA-256: 7420db9ec41012b263dff8e0d039d2a895961a6b4c1647eabbcd20f441fad98a
font_02_sfnt_off00010d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D83 11400 bytes
SHA-256: dd6aee0e29f81469df7e8a02ab05288601e766a9514071941457b0503fbaea3f

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