Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff5af55bdd8d75e2…

MALICIOUS

PDF

94.5 KB Created: 2021-05-12 20:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4a3a5f770060bc4051ffb3fb72664d38 SHA-1: 10f1cf43f853ecf9362a1ef895cdb8c2df78e5f4 SHA-256: ff5af55bdd8d75e2e19465ba59cdef7c956a8d80c295145c4908847081fc2a6f
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/strik?utm_term=what+does+sahib+mean+in+arabic PDF link annotation
    • http://malespw.xyz/nideridorumaximepibufgas78.pdfIn PDF document text
    • http://jesiguvolen.22web.org/cinema_4d_free_for_android.pdfIn PDF document text
    • http://bilkan.fun/fivupixekoperagetofavapimj4w22.pdfIn PDF document text
    • http://usacreditscore.info/georgia_drivers_license_renewal_if_expiredmon9b.pdfIn PDF document text
    • http://robinmani.site/fejakuwono1qdqf.pdfIn PDF document text
    • https://cdn.sqhk.co/rokijatu/BiasFLB/2076966773.pdfIn PDF document text
    • https://legufita.weebly.com/uploads/1/3/4/8/134866723/kitalanoseniw_pakakovom_vixuvuvitaj_kopawoxunuwuv.pdfIn PDF document text
    • https://dezegumi.weebly.com/uploads/1/3/4/1/134108828/jurabepus_vuzaxuro_vaboxosub_gosudoze.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/f1ihbij/voltage_drop_calculator.pdfIn PDF document text
    • https://gidaxejopof.weebly.com/uploads/1/3/4/3/134305554/5214228.pdfIn PDF document text
    • http://bio-ita.fun/johannes_kepler_astronomia_novam4jmb.pdfIn PDF document text
    • http://parkingtest.xyz/78903488478ecmhj.pdfIn PDF document text
    • https://cdn.sqhk.co/nakijalufiw/eiaJFhf/angry_crab_opening_in_san_tan_valley.pdfIn PDF document text
    • https://cdn.sqhk.co/bosesegivu/rUheuI2/tank_traffic_race_warrior.pdfIn PDF document text
    • http://luminar4-download.xyz/anandam_telugu_full_movie_free_mp4tywlc.pdfIn PDF document text
    • http://lnstagramsupportlives.com/8th_grade_algebra_1_textbook_answerspnbfk.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://vudasuluwiviwaj.rf.gd/fatajaguja.pdfIn PDF document text
    • http://wepatimaleb.epizy.com/gexobisovut.pdfIn PDF document text
    • http://vomoguzidazufi.rf.gd/history_of_ganoderma_lucidum.pdfIn PDF document text
    • http://gixogofano.rf.gd/xubojizogagabar.pdfIn PDF document text
    • http://tiguvazigavis.epizy.com/pdf_to_word_convert_download_free.pdfIn PDF document text
    • http://wazikaje.rf.gd/terraform_template_file_provider.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00012b06.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12B06 28328 bytes
SHA-256: 9154a90c710847abfc344f831d0c09abaaaffff5da18f38441285b120fad4a11
font_00_sfnt_off0000f459.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF459 5088 bytes
SHA-256: 6a3b8e6868d87f8ab4391d80fc46a41f4e453906ad290765f64917f498b94dec
font_01_sfnt_off00010580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10580 11024 bytes
SHA-256: e77ff729644c5a17c8dd8af2affb465a6887d0a8849e693dca60c5784146d295
font_03_sfnt_off00015e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E10 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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