Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f840b8a57e2dc9a…

MALICIOUS

PDF

71.9 KB Created: 2021-02-17 02:48:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d69e1e9a0ac8ba0093707284c9f20599 SHA-1: 765c31f0c113924d264bb1fbc2eafe73923060c6 SHA-256: 5f840b8a57e2dc9aa2ef68ea21f3be7b385e2f0f763f7ee2993008cf20aa0d77
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/wix?keyword=apk+radar+map+ml In PDF document text
    • http://ru-en.xyz/posiwosifo3tkw5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421330/normal_5ff280d13c4e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475875/normal_600d9e101c8f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413713/normal_5ff31c8c332e3.pdfIn PDF document text
    • http://remontnatali.ru/rumble_fish_chapter_4_summary1sk4t.pdfIn PDF document text
    • http://123dutch.com/cellophane_sheet_means_in_tamillzi4x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382781/normal_6000ffc59649e.pdfIn PDF document text
    • https://tudexabi.weebly.com/uploads/1/3/4/7/134770635/5713670.pdfIn PDF document text
    • https://koruguliduni.weebly.com/uploads/1/3/4/8/134896859/difotup-jimemapapoje-medumigidoret.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453115/normal_6020a5ee2e23d.pdfIn PDF document text
    • http://ipatovaalena.ru/xbox_one_gaming_headset_black_friday0o5hh.pdfIn PDF document text
    • https://lezezirurebox.weebly.com/uploads/1/3/5/9/135967023/c9ea4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408324/normal_601130206df26.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/zifixijiloxuxe.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/lejivugeleguwod/87118499821.pdfIn PDF document text
    • http://ruzuzis.rf.gd/bhaigiri_2_movie_hd.pdfIn PDF document text
    • http://fepavipa.epizy.com/bluestack_free_for_windows_7_pc.pdfIn PDF document text
    • http://jewikotadukusug.rf.gd/duxovumoxila.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_off0000df45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF45 4980 bytes
SHA-256: 6a32187ba2e4576e9643f215aff69d476990733e4aafc81d9798b22dd2461830
font_01_sfnt_off0000f01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01A 10084 bytes
SHA-256: a6dc072a4314c181110e96fe328112d82306a2dbd4c3167e79242a9d47db744a

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