Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5ddeba65b46af0…

MALICIOUS

PDF

82.2 KB Created: 2021-01-29 18:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1875de3f046a62b44ed86e9c5556499e SHA-1: 368968d4f45b54829bc9734334cee49f522008c9 SHA-256: da5ddeba65b46af0270633926caa589ac7e0b4225115ab0d05f31508b09dd46a
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://yafferge.ru/aws?utm_term=avast++cnet+free In PDF document text
    • https://tizitumobupo.weebly.com/uploads/1/3/4/9/134904485/b3a43143.pdfIn PDF document text
    • https://lumevukivejus.weebly.com/uploads/1/3/0/8/130874583/telefogade.pdfIn PDF document text
    • https://mogoribomos.weebly.com/uploads/1/3/4/2/134266362/b34c4a.pdfIn PDF document text
    • http://oneitstore.info/amazon_music_unlimited_cost4b1nc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366676/normal_5fdfd44c9c5b6.pdfIn PDF document text
    • http://drive4mclaneaustell.com/how_to_do_blockly_games_maze_level_93sait.pdfIn PDF document text
    • http://crubr.space/coupons_for_mcdonald_s_on_doordashdlvt8.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/3625515.pdfIn PDF document text
    • http://tokio-2020.fun/zoxikejulorezefowukewutsylcw.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/bubble_maniac_tea_house_peterboroughvx89c.pdfIn PDF document text
    • http://babysampler.com/download_crossing_void_global_mod_apkppjgs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490369/normal_5ff4ef148d74b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447270/normal_5fc863cfadfe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375522/normal_6009d8f35a8d6.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/rexogeguxosix/winrar_2019_crackeado.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_off000107c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107C2 4892 bytes
SHA-256: b1000265153538e84a5e4a4153fb2c4cb52deda42e8dd4f2c4a01131995ddc8e
font_01_sfnt_off0001187d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187D 10440 bytes
SHA-256: 4e1ae82313dbb6ae3c26ff491c7e18bb1d80168631f3c8ce72f80ffad1ec2b8a