Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb4b51dee62e0299…

MALICIOUS

PDF

70.4 KB Created: 2021-02-04 02:38:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3490dc87e3b01ddbbf2f7dd473e7c733 SHA-1: c3f8b6c5b74a262c63c2feafd59e3c063b624a5f SHA-256: bb4b51dee62e02991fe62c38cbfe52b745d41711d124dc154f9441ec1975a3d5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm. One prominent URL, 'https://baarspo.ru/123?utm_term=paw+patrol+adventure+game+instructions', suggests a phishing or malware distribution attempt disguised as game instructions. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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://baarspo.ru/123?utm_term=paw+patrol+adventure+game+instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489409/normal_5fc61e15639c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477167/normal_5fd5ffdbd1e3b.pdfIn PDF document text
    • http://wilitubejibo.iblogger.org/36081299823.pdfIn PDF document text
    • http://begemotiks.space/261336737264dbma.pdfIn PDF document text
    • http://bosnoslovnoejelaniekupit.xyz/fozabixusuiavvj.pdfIn PDF document text
    • http://smilex.club/1-_888-_786-_4041ckzai.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365598/normal_5ff14ffe4d58a.pdfIn PDF document text
    • https://xujopikaxatanow.weebly.com/uploads/1/3/4/8/134850499/6b4a907581.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_6014b0f02dc56.pdfIn PDF document text
    • http://max-lifting.store/plants_vs_zombies_3_apk_androidy8kus.pdfIn PDF document text
    • http://qwonder.space/physics_past_papers_o_leveleqgtz.pdfIn PDF document text
    • http://vseti.life/21853984262qq6w.pdfIn PDF document text
    • https://tirotulesi.weebly.com/uploads/1/3/4/8/134849952/8947844.pdfIn PDF document text
    • https://bawovaleza.weebly.com/uploads/1/3/2/6/132683088/5449071.pdfIn PDF document text
    • http://zumodaronomana.iblogger.org/btbc_book_ka_full_form.pdfIn PDF document text
    • https://fimedezederuru.weebly.com/uploads/1/3/4/8/134884956/58c2b21b3869b9b.pdfIn PDF document text
    • https://petivevidimow.weebly.com/uploads/1/3/0/8/130813859/bc8d79.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461219/normal_600100db50746.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://kanisal.epizy.com/jotafesu.pdfIn PDF document text
    • http://rovuritag.rf.gd/15804987220.pdfIn PDF document text
    • http://rajuleneto.epizy.com/tubugarita.pdfIn PDF document text
    • http://gotenekopibijo.epizy.com/zevukasogevowarutegukuwif.pdfIn PDF document text
    • http://pegawatovejugav.epizy.com/26597409985.pdfIn PDF document text
    • http://xokowire.epizy.com/vunukunavazenafojeru.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_off0000c80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80B 5428 bytes
SHA-256: f538fdbc140832eb6209bf3a5250e0e708616093959b7579621bf22b54a98e2d
font_01_sfnt_off0000da84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA84 10116 bytes
SHA-256: 5802d8d7f680fcfc1d81282105e256b0c6445629635cd72a53c481e9a4d10e67
font_02_sfnt_off0000fd2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.