Malicious PDF — malware analysis report

Static analysis result for SHA-256 27efb96b4040f994…

MALICIOUS

PDF

75.6 KB Created: 2021-03-17 03:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: afc222e4adbe4e05c1748a8269417ac9 SHA-1: 95647c11f53897ade8015eaf28b4444e7e4c9be0 SHA-256: 27efb96b4040f9943bdbd81e1ab27adc9ea21f074767bc82b410ebbd1cda967f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and 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 0.9996

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://jacksth.ru/wix?keyword=nursery+rhyme+trivia+questions+and+answers PDF link annotation
    • https://busemuvida.weebly.com/uploads/1/3/4/6/134643921/vanamunibut_kawediliveriw_puzelab.pdfIn PDF document text
    • https://navigawagin.weebly.com/uploads/1/3/4/6/134653302/repijaxitaj-memalovekuto-jujoxoj.pdfIn PDF document text
    • http://hotita.space/ninja_revenge_filmv4ejp.pdfIn PDF document text
    • http://wetuferat.iblogger.org/college_panda_sat_grammar.pdfIn PDF document text
    • http://lojasamericanasbr.com/rental_lease_agreement_termination_noticebkx5w.pdfIn PDF document text
    • http://jetirirafu.iblogger.org/what_book_comes_after_hope_to_die.pdfIn PDF document text
    • http://tuimag.ru/242634058042fo1a.pdfIn PDF document text
    • http://trastenmyqort.online/how_to_clock_in_on_adp_mobile_app3tjkd.pdfIn PDF document text
    • http://mobutadaxez.medianewsonline.com/laboratory_experiments_in_microbiology_10th_edition.pdfIn PDF document text
    • https://zozetaxurumel.weebly.com/uploads/1/3/4/5/134590082/f32581dbc73.pdfIn PDF document text
    • http://musc-media.xyz/2166308486l9z8a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saxodanokijaj.atwebpages.com/cuantos_tipos_de_grupos_etnicos_hay.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/billi_billi_akh_punjabi_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisigetizoxif/plastic_sheet_manufacturing_companies_in_uae.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa589e85-b578-4d1b-ae42-588290a236c7/fexinekolokoxawawedij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0af6ca-9a36-4b82-a57b-2b2e78e74656/how_to_use_brother_serger_1634d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/499d2a27-1e27-4a6a-84d8-0733a9a4d66f/solar_electricity_handbook_2019_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/56761164228.pdfIn PDF document text
    • http://wenares.myartsonline.com/sujigegisa.pdfIn PDF document text
    • http://tasijojaludet.rf.gd/57674030495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6adf8966-1c9a-45ad-893f-9a33cd181d39/16347918754.pdfIn PDF document text
    • http://modewomidoxiva.epizy.com/reliability_in_research.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_off0000e9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B7 5384 bytes
SHA-256: 802bd5d027f43026f98347aae2f02775db7f0427b2b748b7f37334862f4b772d
font_01_sfnt_off0000fbef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEF 10928 bytes
SHA-256: b0a81b14ae84fef4de4939780555cc069c4cc0d742e95efd960631080320621a

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