Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb33aeef13ea2511…

MALICIOUS

PDF

77.4 KB Created: 2020-12-01 01:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 11ad7670c683a1526d2ae769d29ca213 SHA-1: 69177af0f026311a24258be73875933fa4b7d01a SHA-256: fb33aeef13ea2511cf06e8078e4f22706cbe48ebd37f96ff8e4e3afca70e67c9
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded URL, https://traffset.ru/123?utm_term=farberware+air+fryer+instruction+manual, is likely used to deliver a secondary payload or redirect the user to a phishing site.

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
  • 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=farberware+air+fryer+instruction+manual PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c70dca82-3eea-4646-a611-eec0d6b7b205/skyrim_special_edition_dodge_mod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6079c5e-63bf-4c4a-8433-cebf7c2a808a/jhene_aiko_albums_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46548995-a5c8-4c66-914b-ed6f30c77810/xadusanudamuxusawawit.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/tijezinifexugapap.pdfIn PDF document text
    • https://s3.amazonaws.com/vojapu/wijunakexexojopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8782f156-7cbd-414c-abbd-2d92787248a0/41804654872.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee079ee0f32b87187269/1606282760084/borulumozagez.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/anemia_ferropriva_pediatria.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/35098823799.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/free_flip_book_maker_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1da9d8c5-4807-47a6-a65c-a2111c1ce33f/south_amboy_nj_weather.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b7fb21-45cb-4de1-b3c8-651b2f469666/xetexanumalekakosati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0216091-7bcb-4986-8737-4a7fb87dc5d5/59803648170.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_off0000e8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C5 5316 bytes
SHA-256: 98d20a65a8df3cf7d6f25828f3d4bb7e1f17b838f7adaa8a04408a8d167ade61
font_01_sfnt_off0000fad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD9 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00010366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10366 10940 bytes
SHA-256: 57a68104a7ca926a02c6e882f6b134ffcd4dd801ff7edfdb3a8b93deb0e3c455

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