Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ba618f48219c6b…

MALICIOUS

PDF

74.7 KB Created: 2021-03-11 06:09:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 54e9eafe3bba302ee6a901f7e430df03 SHA-1: 1f0954b22ea0ea829c91a1324ee62d7329830298 SHA-256: 59ba618f48219c6bc9023aa014df42fd1a84eb667afaf977158d6dcf223aa73c
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and extensive external linking are characteristic of phishing or SEO poisoning attacks designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://midufefew.ru/award?keyword=algebra+1+parcc+practice+pdf PDF link annotation
    • https://bivorafonesakal.weebly.com/uploads/1/3/6/0/136021739/8868039.pdfIn PDF document text
    • http://xefopuro.mypressonline.com/vinyl_decal_application_instructions_youtube.pdfIn PDF document text
    • http://fovoxarofej.getenjoyment.net/39524207106.pdfIn PDF document text
    • https://xakebugus.weebly.com/uploads/1/3/4/0/134018628/libovatag-deradusopujo-paweku-vesozozewu.pdfIn PDF document text
    • https://limotesatax.weebly.com/uploads/1/3/1/8/131871768/5871801.pdfIn PDF document text
    • https://gilawidukawopux.weebly.com/uploads/1/3/2/7/132741225/2528436.pdfIn PDF document text
    • https://xowitato.weebly.com/uploads/1/3/0/7/130776358/baredinirapakinis.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/dopamifewabidakoserako.pdfIn PDF document text
    • http://cyberlife.store/how_to_tie_a_robe_sashm6h4a.pdfIn PDF document text
    • https://zoseduzarososu.weebly.com/uploads/1/3/2/7/132740870/9479924.pdfIn PDF document text
    • https://zulufiki.weebly.com/uploads/1/3/4/6/134662959/puzofemulepene.pdfIn PDF document text
    • http://garogegarar.22web.org/is_jacob_collier_religious.pdfIn PDF document text
    • http://sexedate69.site/denat4zp35.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/tekezufejegiridojo.pdfIn PDF document text
    • https://zuseninin.weebly.com/uploads/1/3/4/6/134606702/bilijeb-tisojasawivu-jufew-gorod.pdfIn PDF document text
    • https://cdn.sqhk.co/mezadisedud/giJjbji/fijixujejatawedodajano.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/jngjgcP/music_equalizer_on_iphone_6.pdfIn PDF document text
    • http://slmit.fun/nuregupofadutelukanozimd5t4f.pdfIn PDF document text
    • https://cdn.sqhk.co/gapebeve/hJRgjre/28286748041.pdfIn PDF document text
    • http://vijesojoruw.22web.org/bosch_nexxt_500_series_dryer_parts_diagram.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://bejiteviv.epizy.com/chrome_theme_creator.pdfIn PDF document text
    • http://fatebem.epizy.com/35071995250.pdfIn PDF document text
    • http://gubawakelu.onlinewebshop.net/ctet_paper_1_answer_key_2020_download.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_off0000da19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA19 4900 bytes
SHA-256: 852c4277925fdf00cfd4493938b0f2b9c1b02285b12324726426456d720dee30
font_01_sfnt_off0000ead3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAD3 10752 bytes
SHA-256: d94add6a297697601ccf92f9024e793e5d5568da165cdf63f42b1c6c8e2577df
font_02_sfnt_off00010f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F85 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378