Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4b99d243ee2b56…

MALICIOUS

PDF

69.7 KB Created: 2020-12-31 22:33:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 31e4d06023d20e318f2b71178083a25d SHA-1: ef09c42959bbf39b5bdf74bddc9d69877eab6a59 SHA-256: 2e4b99d243ee2b56816a5eba585508bea2bd93b7a58121153ad363ecc1d440d6
154 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a known malicious domain, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URL suggest it's designed to exploit users by directing them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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/123?utm_term=meetings+with+remarkable+men+pdf In PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/jeIjc0U/vesemutudilesuxef.pdfIn PDF document text
    • https://cdn.sqhk.co/ritafase/jhgihnJ/endless_run_magic_stone_mod_apk_revdl.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/85806c15-148d-47f3-9bc4-9ab9ace0c96a/4120869069.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd14bfb1-9a25-4d15-a321-5cf656970558/as_i_lay_dying_chapter_33_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ef9e2d2-d0c0-4682-9f3d-c9c1b619779e/4550909580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efc515e0-3e2b-439f-a406-3afd46b5464c/monkey_go_happy_2_walkthrough_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26dd272e-f432-402a-9f1c-532ce3118dbc/history_of_christianity_in_south_africa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ca95c3-ad0c-4223-84eb-1f9348662bf4/27780432342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eff28d02-c40c-4d7a-beec-9b52e1a07829/free_robux_hack_no_human_verification_or_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b492d8a-202e-40da-91e9-314893de42e1/vigimopizanetesipegur.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/tubujuliwajed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/732ac1ec-3aee-4b00-a46f-b7c79c524bd4/download_taxi_sim_2020_apk_data.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57393bf4-fe52-4a9d-a205-6926eded16a4/77596220387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc4dc9ba-5b94-4d3c-92a3-830e3a7fa784/the_stone_vigil_guide.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_off0000cf00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF00 5756 bytes
SHA-256: ee256fa76cd6aa95c61fd5829af1296c2e1bc29cd5e0cd9ed58db154dcd1da8e
font_01_sfnt_off0000e28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28C 11712 bytes
SHA-256: dd0b765ea5aaf4425e1425876c91d59c8c98b178e4d1620771fe7637cf900aaf

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