Malicious PDF — malware analysis report

Static analysis result for SHA-256 5230bb40580475fd…

MALICIOUS

PDF

78.2 KB Created: 2021-01-19 20:09:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a4abdbb5801721d5e4406dfa1b6014f4 SHA-1: 1b0d7dc1f0985afa4df449ab360b6ede3bc004d2 SHA-256: 5230bb40580475fd0fa5ee492076ae91ae688468ad31751c6c0125ee4ec5a6e8
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs, particularly 'https://trafffi.ru/123?utm_term=north+andover+high+school+graduation+2020', suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/123?utm_term=north+andover+high+school+graduation+2020 PDF link annotation
    • http://nutejujaxi.66ghz.com/archery_apk_indir_android_oyun_club.pdfIn PDF document text
    • https://cdn.sqhk.co/pemanunid/mtgcZhj/kubiwemelovozobiwo.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/7xJgjhe/dino_hunter_deadly_shores_apk_mod.pdfIn PDF document text
    • http://memubalejegezur.66ghz.com/annexure_f_for_tatkal_passport.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/cb552f8c30cf9.pdfIn PDF document text
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/ratak.pdfIn PDF document text
    • https://zofigaxukinepir.weebly.com/uploads/1/3/4/2/134235574/mobebati-vebokiz-laxowijaj-kijeri.pdfIn PDF document text
    • http://sizuxubotinukor.22web.org/alberta_works_cheque_reporting_line.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gadoxijumulop.epizy.com/monthly_income_expenditure_spreadsheet.pdfIn PDF document text
    • http://surobufalinaxis.epizy.com/soul_music_album_free.pdfIn PDF document text
    • http://norisufa.epizy.com/galuzadufapudawedutufisop.pdfIn PDF document text
    • http://tujevudaxuxos.epizy.com/4_week_exercise_plan_template.pdfIn PDF document text
    • http://novosumagib.epizy.com/nikosuwexofukuxeruv.pdfIn PDF document text
    • http://mekamaxabojumoz.epizy.com/brazilian_blowout_zero_formaldehyde-_free.pdfIn PDF document text
    • http://nemunuj.rf.gd/22840836230.pdfIn PDF document text
    • http://vefapiba.epizy.com/banjo_trance_song_dj.pdfIn PDF document text
    • http://tuzotulerijenej.rf.gd/fofivijopesobigumipasit.pdfIn PDF document text
    • http://xonefepuvimami.epizy.com/36265182385.pdfIn PDF document text
    • http://zaxutakizet.epizy.com/rafikoritobasifijapide.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF266 5504 bytes
SHA-256: 2496e7210ce92d0380e1b07b77f282af2a69d081beb90d2b80204ba30dc2a9b6
font_01_sfnt_off00010526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10526 11204 bytes
SHA-256: e70496bd2f98d7d0e943ef887e27ce5b87107db4e1f8cb86ff34271dc48c7d73

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