Malicious PDF — malware analysis report

Static analysis result for SHA-256 134d5ec630add142…

MALICIOUS

PDF

75.7 KB Created: 2021-02-08 01:59:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1381d0f476a811ed17a4f9531b863610 SHA-1: 94f14c1495ea69b3f5d823c9ae90643334e3090d SHA-256: 134d5ec630add142ef963e434bd3dd77c1917dc78161cfbed6d3a52647ad492c
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/wb?keyword=awaiting%20you%20myths%20and%20hymns%20pdf In PDF document text
    • http://italiahot.space/jk_haru_wa_isekai2fmbr.pdfIn PDF document text
    • https://cdn.sqhk.co/pefatipi/Dgcjfih/custom_skins_for_minecraft_education_edition.pdfIn PDF document text
    • https://jeluvuxibobuna.weebly.com/uploads/1/3/4/0/134017570/5cb7eac941f.pdfIn PDF document text
    • https://jinajifija.weebly.com/uploads/1/3/4/8/134889339/7c0a54613bc1ec0.pdfIn PDF document text
    • https://bogonifad.weebly.com/uploads/1/3/4/1/134108647/c05fbffe3.pdfIn PDF document text
    • https://taboloralo.weebly.com/uploads/1/3/2/7/132741194/848143.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/EgjheTM/xibogudifaluvitela.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/VwPjghi/easy_royal_icing_recipe_for_cake_decorating.pdfIn PDF document text
    • http://tradebot.space/lowilarosefirap9leh.pdfIn PDF document text
    • http://naturwow.space/2nd_line_apk_premiumdjs5g.pdfIn PDF document text
    • https://vubupegizisave.weebly.com/uploads/1/3/5/3/135315261/1654548.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/fhh7DNH/pizod.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/xonaxevetaf/ankylos_implants.pdfIn PDF document text
    • http://tunowik.epizy.com/ziwubabisamod.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/free_securecrt_for_mac_os_x.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_off0000e88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88E 5512 bytes
SHA-256: e02320b553415703ab0d46d52e4cccc4af1d7ed800c41aa00ce7c6b771b37678
font_01_sfnt_off0000fb50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB50 11232 bytes
SHA-256: fabd193c6015cb41af41f53f4ac4dfef1185b8ac99a09052aaa44fcdc5ac5a57

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