Malicious PDF — malware analysis report

Static analysis result for SHA-256 08f63dbd5b5a502f…

MALICIOUS

PDF

79.6 KB Created: 2021-03-30 13:18:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 753296176e7d5b27ea175a53db73a5f9 SHA-1: c3045a7ec2c835365b64face3b598449fa8953e7 SHA-256: 08f63dbd5b5a502fc31ea9483c7183b66d194acca4c9404f2f3b09634c7e7c58
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://seumenha.ru/strik?utm_term=dan+brown+books+about+robert+langdon PDF link annotation
    • https://sazekunoteti.weebly.com/uploads/1/3/2/7/132740187/dexaniwijev_jitejutofugun.pdfIn PDF document text
    • http://linorusani.iblogger.org/duel_of_the_fates_trombone_sheet_music.pdfIn PDF document text
    • https://tibiwoxot.weebly.com/uploads/1/3/4/8/134881218/pefunol.pdfIn PDF document text
    • http://rikafitamedad.medianewsonline.com/kevoxipikerujonogev.pdfIn PDF document text
    • http://bafezixulu.22web.org/59645149379.pdfIn PDF document text
    • http://basvuruizleme.online/does_finch_die_in_all_the_bright_places_filmd6dqu.pdfIn PDF document text
    • http://wigemefigiw.mygamesonline.org/90851871500.pdfIn PDF document text
    • http://bovewitavivebu.getenjoyment.net/bible_quiz_app.pdfIn PDF document text
    • http://theporte.xyz/828473077610oysy.pdfIn PDF document text
    • http://manapuzasupin.sportsontheweb.net/zuvokuw.pdfIn PDF document text
    • http://feelslike35.com/zupesigegumx2p4x.pdfIn PDF document text
    • https://denagivar.weebly.com/uploads/1/3/1/3/131383646/919f294b9db7c87.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/400f489f96.pdfIn PDF document text
    • http://xijipeva.mypressonline.com/edital_prf_2020_funcab.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/resumen_divina_comedia_de_dante_alighieri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vavuduzika.epizy.com/organic_chemistry_formal_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/powidirufopetifugewaluwi.pdfIn PDF document text
    • http://susabumo.atwebpages.com/download_novel_alice_in_wonderland_bahasa_indonesia.pdfIn PDF document text
    • http://xonafalapon.epizy.com/70541132865.pdfIn PDF document text
    • http://sopavame.onlinewebshop.net/gozizibulalunutob.pdfIn PDF document text
    • https://s3.amazonaws.com/fasudikek/how_to_be_a_3_man_free.pdfIn PDF document text
    • http://boxijekew.atwebpages.com/ethnographic_research_thesis.pdfIn PDF document text
    • http://zutagokakaki.rf.gd/sebonamokijivawotosiki.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_off0000f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64A 5288 bytes
SHA-256: ba05b51ad0606f570119dbb90a324b1f90c07879b73e8e01ed056faf815fffee
font_01_sfnt_off0001086a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086A 11268 bytes
SHA-256: 39667d9f3248f8117505bf7aa1f591d2e5791c0d8c28b9e2b0ec9975434d11f1

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