Malicious PDF — malware analysis report

Static analysis result for SHA-256 8371c1aa52c9f3b5…

MALICIOUS

PDF

71.9 KB Created: 2021-02-27 13:37:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 53c63ce4ac49f215ef16555e5129bdab SHA-1: 22d972814171d68856bb6c46afdbadc4bd4b6e69 SHA-256: 8371c1aa52c9f3b5ccc941cc3f772588c06123434294c378d77ffc375e7563dc
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ponafet.ru/wix?keyword=slendytubbies+3+apk+descargar PDF link annotation
    • https://mapobosani.weebly.com/uploads/1/3/4/3/134385232/2066533.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377128/normal_603456da9adea.pdfIn PDF document text
    • http://changely.club/define_legal_nonconformityxl6bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403271/normal_6021160e8586d.pdfIn PDF document text
    • http://testvvd.xyz/naduzeviwanewebodafovezozki8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453889/normal_5febeceb4b6d2.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/why_does_my_washer_leak_when_it_spins.pdfIn PDF document text
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/ef312932.pdfIn PDF document text
    • http://smotrikino.fun/what_is_a_community_action_committeefosmw.pdfIn PDF document text
    • http://vajogeboru.iblogger.org/fluke_179_user_guide.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408475/normal_5ff4b28962ee6.pdfIn PDF document text
    • https://libizegenumejav.weebly.com/uploads/1/3/0/7/130775388/4311160.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://sawozepanoludib.rf.gd/hueco_tanks_guide.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/57654085848.pdfIn PDF document text
    • http://javuxanasojajex.epizy.com/77852756320.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/busininepuvotumo.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/rokaxes.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/99903487092.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC6 5588 bytes
SHA-256: 4134e80cb26caf4120ead1b59fded950de8c3714a7a932389da5b98abce3759d
font_01_sfnt_off0000e1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CC 10184 bytes
SHA-256: 156af2ad439c051b410f7155ea37cc65c4bfb4464b335ec0cdf9703c7ae8f572
font_02_sfnt_off000104a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A4 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361