Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9205c9889f17d2…

MALICIOUS

PDF

88.5 KB Created: 2021-03-19 09:39:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 52ef0e8d3432f565c8baca094c6976d5 SHA-1: 5cf7d7bafd45f76c435ce3b6cf535692b7033aa1 SHA-256: fa9205c9889f17d254fe2a95605e9633b3dafcc58a8d64303c52ead519bf84be
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs pointing to potentially malicious domains, suggesting it acts as a lure to external content. The PDF structure and embedded links are indicative of a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://fokemale.ru/wix?keyword=hill+country+middle+school+football PDF link annotation
    • https://cdn.sqhk.co/vujenibolo/hgfgcYH/assistant_manager_jobs_new_york_city.pdfIn PDF document text
    • https://nugumogixowujo.weebly.com/uploads/1/3/1/4/131437940/ea406991c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418777/normal_60375b0465393.pdfIn PDF document text
    • https://sojagifuwolu.weebly.com/uploads/1/3/4/6/134689160/420975.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485450/normal_6050fdef4e8f3.pdfIn PDF document text
    • http://derilezin.sportsontheweb.net/energy_storage_devices.pdfIn PDF document text
    • https://cdn.sqhk.co/gigatakel/f3v9Ijh/building_services_of_america_reviews.pdfIn PDF document text
    • http://wabiferofuvud.mygamesonline.org/how_to_connect_directv_remote_to_box.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494166/normal_603ed1fc26240.pdfIn PDF document text
    • http://xofitazuregokud.mywebcommunity.org/jorerupekizujur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489245/normal_5fc84538ae37d.pdfIn PDF document text
    • http://jerunuju.mypressonline.com/60394656694.pdfIn PDF document text
    • https://gojamomajaso.weebly.com/uploads/1/3/4/6/134616238/zoneduvajikeve_zaxemesuvuri_likepudosatakuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481819/normal_601de526af229.pdfIn PDF document text
    • http://zutumufedige.getenjoyment.net/english_for_business_studies_teacher_s_book_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450151/normal_5ff614546ede5.pdfIn PDF document text
    • https://mebolosedam.weebly.com/uploads/1/3/6/0/136009811/nabiderasikajedatav.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/66468192299.pdfIn PDF document text
    • https://wokopapun.weebly.com/uploads/1/3/5/3/135388848/zopiduropixenedumu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00011db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB4 5464 bytes
SHA-256: f02e320595dd018d150e3ed0eb6ebac0a52c0eb20fd48715e756371496493e09
font_01_sfnt_off00013022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13022 10728 bytes
SHA-256: d5d9c37ef67ac63ef348e239fc250c02c296d3a880d6f4c345eebbb9cf65d694

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