Malicious PDF — malware analysis report

Static analysis result for SHA-256 4273a9050e909f11…

MALICIOUS

PDF

73.7 KB Created: 2020-12-02 10:36:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 218021556673ccbdfe0976f9aa5739b1 SHA-1: a274edc511d18cce0d70742c5e434a9f5bdffb36 SHA-256: 4273a9050e909f119c142917af14b79c7221f565eb3a42981848b67aae1520b3
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URL point towards a phishing lure designed to redirect users to malicious infrastructure.

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
  • 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://gettraff.ru/aws?utm_term=shutter+aperture+iso+cheat+sheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367941/normal_5faae5e780025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491925/normal_5fc18cf94f0a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f876b2703ac0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379984/normal_5f8f070e0c9d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384318/normal_5fb45c0237780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f88a6033371c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5fc2c42b5c36d.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
    • https://s3.amazonaws.com/tozaduliwubega/vertical_addition_worksheets_year_2.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf635de18c5c478ef3eed6/1606378334181/gateway_to_prep_schools_transcript.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/17502489122.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0b633d26ff1194f72bba3/t/5fc0fa0461e25426e15b1832/1606482436775/dutasokiwupijapus.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/dna_replication_answer_key.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_off0000d819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD819 4868 bytes
SHA-256: 05d8c0caac43547676e202261f3098c6b362a835a83fe1892deeaea954606d90
font_01_sfnt_off0000e8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B2 10392 bytes
SHA-256: 55b090692eb7c1b12117419a52765d74d43028cfb7a4327dd9f93b721d3934ed
font_02_sfnt_off00010c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

Open this report in the interactive analyzer, or submit your own file for analysis.