Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b53f98d5eb6565…

MALICIOUS

PDF

79.8 KB Created: 2021-06-14 20:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 4e6d435021aa393a991aa28929a6074f SHA-1: 05148fdad5a5df93aaa9d683c41a5778fed40a88 SHA-256: f7b53f98d5eb6565993fc15d354caf3e46713e483718a698a5fc1b406694f59f
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://cructi.ru/pbw?utm_term=convert+multiple+pdf+to+excel PDF link annotation
    • https://loloxanasi.weebly.com/uploads/1/3/4/7/134712840/9ade08fd67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445754/normal_5fe5dfff7c83c.pdfIn PDF document text
    • https://gasodugolulo.weebly.com/uploads/1/3/4/3/134375537/986496.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_605a3cb3817c9.pdfIn PDF document text
    • https://milalidit.weebly.com/uploads/1/3/1/4/131437162/kudomafilav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417222/normal_600be656874d8.pdfIn PDF document text
    • https://nafoxowozuvika.weebly.com/uploads/1/3/1/3/131383754/nezulukedubo-lanusumoxub-fenos.pdfIn PDF document text
    • https://gerudupox.weebly.com/uploads/1/3/2/7/132712596/80850a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447466/normal_602e1c7fad3ae.pdfIn PDF document text
    • https://linazigamatamab.weebly.com/uploads/1/3/1/8/131856602/a2ffbb.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://gamaxidad.pbworks.com/f/sight_word_stories_read_aloud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da3abb84-2105-4b50-8027-3d6e93a5610c/neuropsychological_evaluation_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a60cf810-cce0-4cda-96b4-21794745a76c/teamviewer_14_download_for_windows_7_64_bit_filehippo.pdfIn PDF document text
    • http://rabumofu.pbworks.com/w/file/fetch/144956730/satyanarayana_biochemistry_6th_edition.pdfIn PDF document text
    • http://zuvuwiro.pbworks.com/w/file/fetch/144731958/dead_ahead_zombie_warfare_mod_apk.pdfIn PDF document text
    • http://bekivuxuga.pbworks.com/f/22273944312.pdfIn PDF document text
    • http://wejojixi.pbworks.com/w/file/fetch/144424014/dedutuxinigudukalopezuze.pdfIn PDF document text
    • http://zudilazo.pbworks.com/w/file/fetch/145234614/99569316096.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE322 4948 bytes
SHA-256: e27b6a5114481d0eebae48e84a0c05f9262fe579c341b18cc4aecc928c9b7724
font_01_sfnt_off0000f3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E1 2088 bytes
SHA-256: 414a4c5e7635b1373ff2b6fc256ce934eb10fd1b6deb94c3576d63b7b9f3c835
font_02_sfnt_off0000fdbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBB 11128 bytes
SHA-256: 2ba4dac8949e423f2a39331b618cd40a15013178df1b3872e949749fca643d98
font_03_sfnt_off00012381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12381 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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