Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcaece340249f26e…

MALICIOUS

PDF

87.5 KB Created: 2021-06-05 21:03:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: fe32e5e8ad8869f89d5bc0909be96833 SHA-1: ae58955b6a274340a674e3437c59be746117af94 SHA-256: bcaece340249f26e7b9ddb63eb0cf224c73337b8f68d98111b63d747c0b75d88
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, flagging it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users to potentially malicious sites. The presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://seumenha.ru/123?utm_term=bloodroot+forge+eso+guide PDF link annotation
    • https://tazifidaron.weebly.com/uploads/1/3/4/9/134901468/soguxobafu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414164/normal_60b7eec07f5a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463830/normal_60357854ef9fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387806/normal_5ff39d0b39c4e.pdfIn PDF document text
    • https://wazijewafaset.weebly.com/uploads/1/3/4/4/134437152/d00675dc592003.pdfIn PDF document text
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/kuken.pdfIn PDF document text
    • https://fakodide.weebly.com/uploads/1/3/0/8/130874451/3320078.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451021/normal_5ff3b40fc9632.pdfIn PDF document text
    • https://lisajakuxateril.weebly.com/uploads/1/3/4/3/134349263/xivadilawopasur.pdfIn PDF document text
    • https://senuwisaf.weebly.com/uploads/1/3/4/0/134018119/dizuputagazutiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450251/normal_5feefa039c158.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464542/normal_5fe22b16153b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444646/normal_602b01e844e6e.pdfIn PDF document text
    • https://mezamelakinates.weebly.com/uploads/1/3/5/3/135304028/388072c2f6710.pdfIn PDF document text
    • https://verefatodefi.weebly.com/uploads/1/3/4/7/134722939/25549830fd7477.pdfIn PDF document text
    • https://sitiguzesamow.weebly.com/uploads/1/3/4/4/134401829/5215978.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://memofemovo.pbworks.com/f/vuvanilaveto.pdfIn PDF document text
    • http://sajateves.pbworks.com/w/file/fetch/144463953/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7c5aa2d-7c8f-415d-85b2-bb3cb09d3031/blue_moon_chords_billie_holiday.pdfIn PDF document text
    • http://felefejimax.pbworks.com/f/the_crucible_act_3_study_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c36a591b-020f-483a-87c3-9572a49cebd1/whirlpool_fridge_replacement_handle.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c85d47e-9d2f-4013-825f-5e31f5bcdc36/total_surface_area_of_cube_and_cuboid_worksheet.pdfIn PDF document text
    • http://zubipuwaf.pbworks.com/f/do_i_have_a_warrant_out_for_my_arrest_in_utah.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAF 4692 bytes
SHA-256: db2c24d26942cba2d42ccb19cbd40bf3b5b01d5287a51e52792e64784ded303d
font_01_sfnt_off00011bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC3 11596 bytes
SHA-256: 4d059ebdc843c13831590baa1d3f0f75199f0fe5f00a0ff4f78d7bb93f527ea6
font_02_sfnt_off00014224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14224 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3