Malicious PDF — malware analysis report

Static analysis result for SHA-256 126f6c44fcdb5f50…

MALICIOUS

PDF

67.7 KB Created: 2020-12-23 01:13:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 5baea2a275a4eb71e12576ccab322f2a SHA-1: 0cdb2ff052d031c7c588ca4bb907bec990570c4a SHA-256: 126f6c44fcdb5f507388207404a55d67eaa9655d73d08e135de4d71430b3b272
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and exhibits characteristics of phishing content, as indicated by the ML classifier and ClamAV detection. The document body, though partially corrupted, contains text that could be used as a lure. The primary malicious URL identified is trafffe.ru, which is likely used to host a secondary payload or redirect the user to a phishing 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://trafffe.ru/strik?utm_term=word+family+definition+language PDF link annotation
    • https://paviliwele.weebly.com/uploads/1/3/4/4/134489687/c7e7bcd3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418556/normal_5fc13654b0f03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497071/normal_5fd87027b82df.pdfIn PDF document text
    • https://jadegivi.weebly.com/uploads/1/3/4/8/134851053/c8f641712a.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/jutenojamega/best_video_player_android_github.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/arabic_alphabet_dotted_tracing_practice.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/tuvexusanolitoginijolebij.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/womukoviwexelemikewatufow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af6d8e0-4ab9-47c3-87e5-1c0cae2236d7/bed_head_hair_straightener.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/what_is_the_apex_predator_of_ocean.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/accuplacer_study_guide_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/potevinur.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_off0000cc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC73 5164 bytes
SHA-256: 854e315185c2af866ef648cdebf836e2d917861f72445f9159639bc23518a8d4
font_01_sfnt_off0000de06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE06 10432 bytes
SHA-256: 064bd4e81fdb4b56ec12b6ff9fa99c6504c9d717b3bc6455bffdd0f7dc1754f8

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