Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3500947af9027d…

MALICIOUS

PDF

79.1 KB Created: 2021-04-02 09:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 41cd27a51dbae5294e0447cc29641bb2 SHA-1: 7062402b68e42369df87f34e8b6b323162d9a539 SHA-256: fe3500947af9027d1c9c13d7d9435bed7a0cd1bbff0d1330f002b1ee1edf6711
126 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to external link farms hosted on disposable domains, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text related to a 'Calendario mundial rusia 2020', indicating a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://lozipotod.ru/award?keyword=calendario+mundial+rusia+2020+hora+costa+rica+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482870/normal_6022f19503aa9.pdfIn PDF document text
    • http://gegetibobiduvud.iblogger.org/35427668596.pdfIn PDF document text
    • http://datifuxevewa.22web.org/23614107795.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/ps1jfpp/logoredasuko.pdfIn PDF document text
    • https://cdn.sqhk.co/zafilivopupu/crjhB1W/boss_2_dj_song.pdfIn PDF document text
    • http://norusezuluwo.iblogger.org/how_much_do_2nd_grade_teacher_make.pdfIn PDF document text
    • http://setirexude.22web.org/learning_english_basic.pdfIn PDF document text
    • https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/keropujafo-woxego-bubogaf.pdfIn PDF document text
    • https://fitisasituwag.weebly.com/uploads/1/3/4/8/134846324/fobekibekizirixuja.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493610/normal_600698e71122c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486192/normal_604f2a415bac4.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/vcwt3hg/mejamaruminavokaxod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469101/normal_600d44de3f228.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/33hejdJ/66160873986.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_52e04aafda2c45439e5e4413bc993bd0.pdf?index=trueIn PDF document text
    • http://wefebamis.rf.gd/pilinupim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c4ef1db-47be-4a71-8ab6-c56a02799627/gelenobovaremezewalipise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49859774-b172-4c1d-addc-e6ecf67c31b7/acer_aspire_e15_windows_10_neu_installieren.pdfIn PDF document text
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_5c2cfec6169d4b19b797cfe955217860.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1012b25d-30e2-4485-a66d-194b90a7de71/5_3_bank_mortgage_rates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46014b18-440b-497c-9bd0-7d821ae4e233/leafpools_wish_allegiances.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_off0000f6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6CD 5572 bytes
SHA-256: 895703bc916903da94d6f4fb4730807a5fc996c8f6ad90d75557f229c0f6a5db
font_01_sfnt_off0001098d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1098D 10900 bytes
SHA-256: 118a502c9be73adde5faebe51b12b9749ca1b7426fb51bd44863ef1d549926b5

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