Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2f89728a7db9dd9…

MALICIOUS

PDF

76.8 KB Created: 2020-12-17 03:12:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 277377abf85d6d66fde8bd0dc43b7313 SHA-1: 54fd8e80243effe286a244b72d8b9dbe4af9897f SHA-256: d2f89728a7db9dd984ed0dcc520cf5d8730ce31593fb58c8057caf5f7ac5179c
96 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that points to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to contain a prompt that could be part of a social engineering lure.

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://traffset.ru/123?utm_term=a+summary+of+the+characteristics+of+someone+able+to+perform+the+job+well+is+a+________ PDF link annotation
    • https://fulojozizarotuv.weebly.com/uploads/1/3/4/3/134318677/89b231bad7cf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484118/normal_5faf780a8c365.pdfIn PDF document text
    • https://venifamu.weebly.com/uploads/1/3/4/5/134501621/4249c8115a7c47.pdfIn PDF document text
    • https://gigemapafinul.weebly.com/uploads/1/3/1/3/131398374/814686df5ad9ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/5g_beamforming_ericsson.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc660b9c6229360ecd248cd/t/5fcb801821c0486e9195925c/1607172121328/87512075120.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5c91011f6a41984a72723/t/5fcd6990978da30c561108a7/1607297426026/black_friday_sales_at_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db636177-91d0-4ba4-985a-c229b9f4b595/20893090869.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/ruruwodavonamirojirozetew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eed8c80-7bac-4ed2-923d-429cfb17af71/romeo_and_juliet_law_age_of_consent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f6410e-505e-4a6c-bcc9-cb5cc33faca0/fimomopip.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc654e0affbf90a660f952b/t/5fd65717dca2215260402779/1607882519926/kisidafo.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_off0000eb8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8E 5716 bytes
SHA-256: 73c622c8a91b360d6760a7312fb1c7c65556b6ab4fab9c4483abc85570fb0cea
font_01_sfnt_off0000fefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFC 11336 bytes
SHA-256: 5ad5c965928245ab9a4be8d2fb90ab1a3687ff20be01ddabaeb86ae453c78349