Malicious PDF — malware analysis report

Static analysis result for SHA-256 a180055e62af1ff0…

MALICIOUS

PDF

73.7 KB Created: 2021-03-11 12:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: ef6f0bb5a744f05a7949228c1fbb23ee SHA-1: 1dbc8d80bdfa2a96926d59bf18b53bdd784f7c14 SHA-256: a180055e62af1ff0bb721904fc7e78d30b54e967300cf3cfd29230bb01dc2dc3
126 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to disposable hosting and are likely part of a link farm designed to manipulate search engine results. The primary malicious URL, 'https://resalured.ru/aws?utm_term=educational+value+of+television+essay+200+words', is presented as a search result, attempting to trick the user into clicking it. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this document.

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://resalured.ru/aws?utm_term=educational+value+of+television+essay+200+words PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4463538/normal_5fdd26c77cca1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_600d953dd1bdd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486765/normal_602eb00024fdf.pdfIn PDF document text
    • https://cdn.sqhk.co/vokalater/eiifihz/37505123654.pdfIn PDF document text
    • https://cdn.sqhk.co/wuxidubez/hhiiwha/xugegafutadotuwugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408333/normal_5fd32b8141bb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459641/normal_6046fc80f26b7.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/hgeQE6R/top_songs_2019_list_clean.pdfIn PDF document text
    • http://kiwirixup.22web.org/catalogo_cables_belden.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_60474aa10c13b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_5fd6ef888b450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461509/normal_603e2615e7fe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477379/normal_5fe977fb542a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://monawob.epizy.com/how_to_use_autocad_2021_for_beginners.pdfIn PDF document text
    • http://sasofinifujilo.epizy.com/54179881779.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9479b088-796d-48ef-8d6f-8592a3c99f02/grant_privilege_to_user.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2934152a-31be-4b7f-ad3f-227d1b907add/what_is_spindle_apparatus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69327535-fb81-488d-8270-e4f4550d81e2/dixoxidakawetovek.pdfIn PDF document text
    • http://rakimeramut.epizy.com/13191095361.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b3ea6bc-ae82-4b06-9723-c6836cf7f229/sawanaxorumi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3afa0dc1-9adc-4249-b754-e7286fae1dec/lg_refrigerator_lower_ice_maker_not_working.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_off0000e533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE533 5500 bytes
SHA-256: 0dce45e2e15b63da5814a5bc7bc1fb4d9ca5c313f66139958ef74840531a666d
font_01_sfnt_off0000f81a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81A 9784 bytes
SHA-256: 040d37203d623a6bddefa7994ceb16e17697d2d49fd1cc5fb2afe38793afe53a

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