Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5b0779dddf13b2…

MALICIOUS

PDF

76.3 KB Created: 2021-03-01 12:16:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d48adbfaae4501868c049fd57b21384e SHA-1: 8b3026871c6f766f6d60a57aab444979c7058f2f SHA-256: fd5b0779dddf13b2c6de9d5aaa6a5a63ebb71ac5955f6d8a15abf9a7d237ad73
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/award?keyword=why+will+my+samsung+tv+not+connect+to+internet In PDF document text
    • http://mmamba.ru/norivuwunubegojorefowenekv2xqo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381101/normal_5fffdd029deed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404121/normal_5fe9fe371ba12.pdfIn PDF document text
    • http://arthromedro.xyz/38236622342h21ab.pdfIn PDF document text
    • http://xopatiz.iblogger.org/getut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380857/normal_5fe3d6b263bec.pdfIn PDF document text
    • http://apple-fruit.space/kunavil2kn77.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/tokatefozude/reading_practice_worksheets_for_2nd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/asm_handbook_volume_19.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/heat_and_glo_fireplace_insert.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/b_pharm_3rd_year_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/49ers_current_injury_report.pdfIn PDF document text
    • http://gasikogo.rf.gd/pack_n_play_mattress_measurements.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/28982229314.pdfIn PDF document text
    • https://s3.amazonaws.com/jixerubowi/broadcom_wifi_driver_for_ubuntu_14._04.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_off0000ef4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4B 5480 bytes
SHA-256: 0bf8e98dc1e475e8e1042cce05da39549c66a5f921c98ee701f202b91f099628
font_01_sfnt_off000101eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101EB 10032 bytes
SHA-256: 0e50a1988f00745ca32850673389454e5bcd3d3623ef1a63f68f0ef5c61d05bf