Malicious PDF — malware analysis report

Static analysis result for SHA-256 780c28d56d860673…

MALICIOUS

PDF

70.7 KB Created: 2021-03-01 03:18:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 26a935b6684a887abbaec8bcf1527982 SHA-1: 29b57b360ea5d1510a48bf355324f278a8e7eb60 SHA-256: 780c28d56d86067326317d7020213d95702d135d8f4d00efd879bfeb78fa92bc
124 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URIs and is structured as a link farm, suggesting an attempt to redirect users to malicious websites. The document body, though heavily obfuscated, contains keywords related to 'public relations examples 2020' and application metadata, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9649

Heuristics 4

  • 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
  • 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://leonvi.ru/award?keyword=bad+public+relations+examples+2020 PDF link annotation
    • https://cdn.sqhk.co/kelufuro/uTqgcgg/filibepowoger.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477379/normal_5fdcc1e5ace3f.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/17466180210.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/5RhfXge/bengali_to_english_date_converter_online.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/taco_bell_chipotle_sauce_nutrition_facts.pdfIn PDF document text
    • http://vumamanepu.sportsontheweb.net/how_the_grinch_stole_christmas_2018_on_netflix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497695/normal_602ff864f31b9.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/cjfM8ji/airbnb_coupons_not_working.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457318/normal_5fdfb75b916e2.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/32761122143.pdfIn PDF document text
    • http://tolizidusinakil.22web.org/the_crucible_act_2_movie_study_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_5fd776df1d88b.pdfIn PDF document text
    • https://cdn.sqhk.co/mokavokaven/KMij8yJ/legapetejul.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455684/normal_5fe02ec3026ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467915/normal_600fa40fb7864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452853/normal_5fd1f619ce6d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zemonipovop.epizy.com/dell_t3500_ram_ecc.pdfIn PDF document text
    • http://wavubodalut.epizy.com/balkaniyum_tv_player.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF613 5752 bytes
SHA-256: 664c3e37254dcdfff0cf8f0f1c4a78a1739bf2757641d7e20642c3041d74af65

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