Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da0ec235ca3e369…

MALICIOUS

PDF

74.6 KB Created: 2021-06-08 23:02:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a1712978a73a166af98bbb761387b9c4 SHA-1: a950342790fec62725be98c6c37d66968987bfea SHA-256: 2da0ec235ca3e369aae6e079603a5c8620a6e79c8d1c28050915dd72c69a155b
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier also strongly indicated maliciousness. The primary attack pattern appears to be directing users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://laborke.ru/pbw?utm_term=how+to+pair+a+plantronics+plt+bluetooth PDF link annotation
    • https://lilufegat.weebly.com/uploads/1/3/5/9/135965666/faguxulodutadak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475737/normal_60b95dbadb0f5.pdfIn PDF document text
    • https://mitanifujokuvu.weebly.com/uploads/1/3/0/9/130969645/a08f07e6807.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488092/normal_6040368cb5938.pdfIn PDF document text
    • https://vujivizu.weebly.com/uploads/1/3/5/3/135305207/taxakitan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417423/normal_60434d0b530bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471959/normal_6049ae4094926.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8df2ab3-38e0-4484-be16-061bf69f7656/88352781836.pdfIn PDF document text
    • http://vibasuvezuz.pbworks.com/w/file/fetch/144667563/types_of_tea_and_coffee.pdfIn PDF document text
    • http://mevuteled.pbworks.com/f/sugexivijemoxezevanag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/906e7a33-9268-436c-80dc-65b988440508/mudila.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b53a830-51cc-46e4-80fa-b66b93d4aeb4/what_size_air_force_1.pdfIn PDF document text
    • http://morabef.pbworks.com/f/how_to_do_a_salaries_journal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a366bbd-01e3-4768-a055-571a2fcc0d53/1016661758.pdfIn PDF document text
    • http://lomubel.pbworks.com/w/file/fetch/144497160/can_i_connect_to_my_chromecast_without_wifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41f15e6c-7a55-4cb3-b5ee-1e9385c4dbb3/jafazuzidolametuxolanup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67ad0fcb-7e9e-4abf-9cd4-98ba58f0e793/sidiredezunugod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5fe050d-0505-4797-8294-a83273d14adc/bruno_mars_marry_you_video_with_lyrics.pdfIn PDF document text
    • http://gudikijuruf.pbworks.com/w/file/fetch/144600651/les_aires_urbaines_3eme_fiche_de_revision.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20dde008-19ce-4279-b7e4-113a068a4383/japavitetetabadesikum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/714b8258-b2b8-4fe9-a625-70f6a81cda4e/ben_hill_griffin_stadium_seating_chart_garth_brooks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de0794b1-7e9d-4052-86d8-43a9feb920dc/mefux.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_off0000e5fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FC 5212 bytes
SHA-256: d73fabef11cc40ae731912751401678e1347b83e050d4002a697d35dac224ae7
font_01_sfnt_off0000f7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B7 10940 bytes
SHA-256: 3eda0fdbfbb427a93bb5fef8c02d699314906222257ae1e3ccb0f46e709c5af6