Malicious PDF — malware analysis report

Static analysis result for SHA-256 b831352b117b2dbe…

MALICIOUS

PDF

68.6 KB Created: 2021-02-11 15:10:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 05ee99828130af1635746f3fb29b533e SHA-1: 0cde0a0053d2945460aba9010ecaeb3e004b7a9a SHA-256: b831352b117b2dbe7e3e616660b8922907f573eed3d43fba951586eccf2d8723
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=ancient+china+webquest+british+museum+answer+key In PDF document text
    • https://cdn.sqhk.co/nunewole/hggeie2/zutaxuj.pdfIn PDF document text
    • http://takipleskazan.org/contoh_format_email_formalinw8x.pdfIn PDF document text
    • http://edapog.online/menilefavubegitawetnpj9d.pdfIn PDF document text
    • http://shop-kid-toys.online/the_new_gate_schnee_and_shinfmkbv.pdfIn PDF document text
    • http://meblik.su/turkish_march_sheet_music_musescore95de0.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/40605260489.pdfIn PDF document text
    • http://criticcxck.space/hacked_bullet_force_accounts_pc9ivfu.pdfIn PDF document text
    • http://merogerofame.66ghz.com/aerobic_exercise_mp4_video.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/geyTijv/vegas._com_coupon_code.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/rBkBsid/todujazivaw.pdfIn PDF document text
    • http://metagopu.22web.org/92218080204.pdfIn PDF document text
    • http://idealicaitalia.website/lonely_planet_cuba7ennn.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/tobaziw/fikusefumukaxolaruw.pdfIn PDF document text
    • http://kosuvoz.epizy.com/zupabunuwi.pdfIn PDF document text
    • http://podoremekuzepo.rf.gd/pewevurak.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/kovabapateburup.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/chilled_water_piping_design_software_free.pdfIn PDF document text
    • http://nenedabex.rf.gd/bullfighting_art_form.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_off0000cf95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF95 5520 bytes
SHA-256: c6319ad2f3c385f2a2eef01b58e66b63f89ac32ee3f0848ef2c886604f163cf4
font_01_sfnt_off0000e24b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24B 10136 bytes
SHA-256: 6c805c4577900298fb7412d5703c75c2a78357533a90c7115cf72c114788b321