Malicious PDF — malware analysis report

Static analysis result for SHA-256 07d7dd6fc608f0d8…

MALICIOUS

PDF

67.8 KB Created: 2021-03-17 17:44:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c8df7bebcca9356145fc0b43b24dcf78 SHA-1: edaf4393769c2bc5b0b1bdc1022a65adf6979de1 SHA-256: 07d7dd6fc608f0d8df068571518f2bb88a76d16c820692c701308698d55f8036
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

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://soxebez.ru/123?utm_term=yu+gi+oh+duel+link+deck+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4392453/normal_60048ebf412f1.pdfIn PDF document text
    • http://motubudasuvapan.medianewsonline.com/82833492302.pdfIn PDF document text
    • http://mazejofeg.mygamesonline.org/berepivob.pdfIn PDF document text
    • https://cdn.sqhk.co/gubujurit/6nBSu9k/fofadad.pdfIn PDF document text
    • https://cdn.sqhk.co/tusufawenu/dMMBquL/26051792126.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/moxovufojazu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425759/normal_6001fe2648562.pdfIn PDF document text
    • http://harmony-market.ru/everything_at_once_lenka_sheet_musicr2bot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425255/normal_5ff9789d03ea8.pdfIn PDF document text
    • http://covid-19online.site/arabian_nights_sheet_music_free2tvny.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/hbhfn5p/87872952968.pdfIn PDF document text
    • http://babysampler.com/sodenizokig71hn.pdfIn PDF document text
    • https://cdn.sqhk.co/fezavomol/nKhhiii/last_cloudia_character_tier_list_jp.pdfIn PDF document text
    • https://cdn.sqhk.co/komagiju/kE2igic/magic_rampage_secret_areas_2-_3.pdfIn PDF document text
    • http://figejewumoposes.getenjoyment.net/pirogilowoxeremis.pdfIn PDF document text
    • http://good-production9.site/trane_xv95_troubleshootingev4yb.pdfIn PDF document text
    • http://tipofeliluget.medianewsonline.com/88032783977.pdfIn PDF document text
    • http://bnl-jobs.com/what_is_the_purpose_of_citizens_band_radioyp3yc.pdfIn PDF document text
    • https://cdn.sqhk.co/xinulezebi/hg7gfhc/nanny_mcphee_big_bang_film_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/motuvitewodi/Ajfu52h/lynx_lake_campground.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sewujajapivix.onlinewebshop.net/fuxenugodopulinamadibuk.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_off0000ceb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEB1 4744 bytes
SHA-256: 5a963e1519a96ee25f01afd8f98e068b57b2c859be1f095885e55024b282b73c
font_01_sfnt_off0000deda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDA 10188 bytes
SHA-256: 2ff7b2fcb874c4801f214d008ef4377b90d8e05e907fd76d2cdff0c36054c3bc

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