Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f7a210a65c2861…

MALICIOUS

PDF

74.6 KB Created: 2021-06-04 01:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 74fecfad0098ffe6774528a187066859 SHA-1: e2b9f3a038aaa533c9b83e0ebaf6f0e00e26e820 SHA-256: 75f7a210a65c2861047bb789c5939c21b326bdc529dc9be954c11bfdf65b2f97
134 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a site offering 'how to hack 8 pool coins and cash', suggesting a scam or phishing lure. The PDF also functions as a link farm, directing users to various external resources, increasing the likelihood of a malicious download or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://krisoc.ru/pbw?utm_term=how+to+hack+8+pool+coins+and+cash PDF link annotation
    • https://siputewebototab.weebly.com/uploads/1/3/4/4/134480832/zonulufif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421614/normal_604ae8a775100.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486965/normal_5fe9d3956a611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374372/normal_602b2ada10e78.pdfIn PDF document text
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/niladajira_namelubafemes_zixadiwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_60661e1306a30.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kedefoviraj.pbworks.com/f/sports_certificate_template_word_free_download.pdfIn PDF document text
    • http://mawasuwov.pbworks.com/f/famajozo.pdfIn PDF document text
    • http://puzavofan.pbworks.com/w/file/fetch/144578892/84768317566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/997e903c-43ef-43cc-a8e7-6375f5abdae4/legendary_brawl_stars_apk_mod_android_1.pdfIn PDF document text
    • http://vixifalino.pbworks.com/w/file/fetch/144573786/xenuvojarixodigijadazalob.pdfIn PDF document text
    • http://sovafiben.pbworks.com/w/file/fetch/144543324/24680124735.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14451ed6-8eb5-4c85-989b-241f95ac7395/11102952290.pdfIn PDF document text
    • http://dekokos.pbworks.com/f/13610793161.pdfIn PDF document text
    • http://fufitiruw.pbworks.com/w/file/fetch/144568617/42784283369.pdfIn PDF document text
    • http://sagidetubi.pbworks.com/w/file/fetch/144550839/zowedurixitavasofebum.pdfIn PDF document text
    • http://fokopaviwu.pbworks.com/f/dicionario_portugues_ingles_baixar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1df9abab-e92b-40bf-be0a-46c6bca7e9d7/spark_book_dragon.pdfIn PDF document text
    • http://wemilamozede.pbworks.com/w/file/fetch/144550989/53735223207.pdfIn PDF document text
    • http://xesimisejek.pbworks.com/f/69995585826.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_off0000e59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59D 5376 bytes
SHA-256: 4f95471f280076e3e27ae73f984c28819059dd6e0edfedc12588eb812c6ed8b1
font_01_sfnt_off0000f7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F3 11068 bytes
SHA-256: e4683c53a5d1f0af06950f4c7ac1a5f101534dbeadfe2236b795171032239af4

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