Malicious PDF — malware analysis report

Static analysis result for SHA-256 b04b48f46b4d2b63…

MALICIOUS

PDF

74.6 KB Created: 2021-01-01 19:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 60f0ee707e1dbc39e8d53184a1065a81 SHA-1: 96cc7e0abe194be76543a0af2ca2a7135b7640d0 SHA-256: b04b48f46b4d2b63880123da0db77106d3dc9bf5e1d36f34b62181a9d542ae76
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the link farm heuristic points to a broad distribution strategy.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=cat+horror+cartoon+video+call+pranks In PDF document text
    • https://pepowogipiwud.weebly.com/uploads/1/3/4/3/134344034/ce1f7eebf6fd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424376/normal_5fd2ed6d6d612.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501380/normal_5fe23419cd135.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379032/normal_5f9398be24124.pdfIn PDF document text
    • https://kimakinogi.weebly.com/uploads/1/3/0/7/130775446/2858213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381098/normal_5f8ba27e9f39d.pdfIn PDF document text
    • https://gorugofinugiv.weebly.com/uploads/1/3/4/3/134334376/nufevejipegusa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f874277af314.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/c83a5aee-a37d-4ff9-98d5-ec08b8b97ba0/94148134578.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0515893c-94da-4526-98d1-78f5e41a899e/chiappa_rhino_holster_30ds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b703be09-e5f3-4553-a5d8-50dce336d4e0/81622767306.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20700853-4009-4ccd-8ca3-a33dacdf52f2/north_harris_college_library.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa5edd9e-5fc1-4dc1-8df6-29a7c54d9744/rome_total_war_2_cheats_add_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a9fdf51-88f0-4239-b0a8-b06da4494f74/kb_to_ka_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54099ec9-c6e9-4bc2-bc33-1034e11671fa/cambridge_latin_course_book_1_avarus_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d02a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD02A 5188 bytes
SHA-256: f2efaead9f09cbef70854b9e42933018565875670944b7977850a2825064ea97
font_01_sfnt_off0000e1ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CA 10672 bytes
SHA-256: e30756eff20fa94dd485c2e0524d8c10ec780425794cc228092ba05e0877bec8
font_02_sfnt_off00010616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10616 16700 bytes
SHA-256: 84f173b5af896d8153e9ff1630249d59f6531d3012401d385f67ffb7588f20c6

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