Malicious PDF — malware analysis report

Static analysis result for SHA-256 27fc3e6f515e0ec7…

MALICIOUS

PDF

76.8 KB Created: 2021-05-25 11:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: abbddd1ffd595c97ceb1df2dd2cccb02 SHA-1: 27ebc8d11bc86450af8d0b77c29602a16d143050 SHA-256: 27fc3e6f515e0ec75d5f872396885e3f6c1f28dbb647d696e0a69de814fa10d6
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit user curiosity and lead them to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/strik?utm_term=how+big+is+a+13+inch+laptop+screen PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4402953/normal_601efff122ebd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481841/normal_604cf99a84821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379613/normal_605bf438153c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452839/normal_604ab6a340417.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408595/normal_603e4e67d2e14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380692/normal_60176d766ca83.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/18906c30-e90f-431b-af50-3ad6ac74312e/love_story_song_movie_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/675abb16-43f6-48c5-922f-0bc9e620c4d6/93123281546.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/how_to_structure_a_narrative_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/987fa686-ad49-44ac-986c-cd2415b8f7d3/dragons_4_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e70afd78-0cd1-4f3b-92a0-b2f1d3e4cdfb/47554809290.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/napawumawilupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16a8f159-cd89-4aa7-a36d-04dd5b59d302/amazon_web_services_testing_with_soapui.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e85d166-7cde-448c-a2f6-cd17e09f019a/bravely_default_2_boss_guide_chapter_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dffa8e96-b7bc-4385-ba7f-23ad08ed0ad0/basic_1h-_and_13c-nmr_spectroscopy.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/babafuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f1226ed-77cb-438e-b17d-a34d2b015986/wuvometidifa.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/wood_joints_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce0c3a0-7eb5-4107-9c5f-555345099192/neato_botvac_maintenance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e57757e-95ea-4b19-8db7-7d2ddfa1fdbb/66240175512.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_off0000ee4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE4F 5604 bytes
SHA-256: 7abad7336e308db73c98bb64dabcab88859afbc75ea0fd5b5cc4ea1e482b212d
font_01_sfnt_off00010175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10175 10580 bytes
SHA-256: 39e68f633def167126e65fb4bef5960a095d7a7a830634d2d8d14962b2563d1c

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