Malicious PDF — malware analysis report

Static analysis result for SHA-256 2662c81f26479683…

MALICIOUS

PDF

79.7 KB Created: 2021-04-03 08:53:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb7c13e529935989b89fc0533fc81bd3 SHA-1: 4115f68df91e845d731bd57580ef3b155478835a SHA-256: 2662c81f264796831ce4f7ed7e9613163615ea6043962a29924a7b9110f2dcce
96 Risk Score

Malware Insights

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

The file is a PDF containing multiple embedded URLs, one of which is flagged as a high-risk phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF_URI heuristic points to a specific URL that appears to be part of a social engineering attempt, disguised as a sewing book, likely to lead to a secondary payload download.

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://druttle.ru/award?keyword=simplicity+sewing+book+pdf
    • http://nuwevabufa.mypressonline.com/incentive_plans.pdf
    • https://cdn.sqhk.co/moxofudifafi/hfjibDy/rakisezagarogej.pdf
    • https://cdn.sqhk.co/lafixafif/wjhhggJ/lebasugubaxijuxurugofe.pdf
    • http://nefuwumimo.iblogger.org/29091085645.pdf
    • http://faxixovojaja.sportsontheweb.net/parts_of_speech_jeopardy_game_online.pdf
    • https://cdn.sqhk.co/daxegajok/Thgjag2/definicion_neurosis_segun_psicologia.pdf
    • https://cdn.sqhk.co/rasetiwulipu/ihdgg0m/82389516042.pdf
    • https://cdn.sqhk.co/nalujujoso/hdhcgjQ/hello_neighbour_act_3_green_key_room.pdf
    • http://sujatafuluwariv.22web.org/46238822305.pdf
    • http://xiselegudiwip.iblogger.org/chromatography_multiple_choice_questions_and_answers.pdf
    • https://cdn.sqhk.co/gajerivab/ijahbjg/gipulalefi.pdf
    • http://jekeluxuto.mywebcommunity.org/best_books_to_read_before_you_die.pdf
    • https://cdn.sqhk.co/xefilelo/QhhA1hd/digdeep_image_recovery_for_pc.pdf
    • https://cdn.sqhk.co/sogefuluf/jbgguij/puzevutaxepadafora.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://badasesodawol.rf.gd/plantronics_wireless_headset_for_polycom_vvx_410.pdf
    • http://kuvorewenosabe.epizy.com/vavupuxa.pdf
    • http://kukokiw.rf.gd/lutalanumo.pdf
    • http://vakizonozajaxe.onlinewebshop.net/craftsman_lawn_mower_parts_breakdown.pdf
    • http://sexujojo.epizy.com/viberopejevaxaf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecf5.bin
5ee13c1f970a6ff2f6ca1898221dfe5e17e088848851c11c1d60a7fc1645e93f
pdf-font-stream PDF embedded font (sfnt) at offset 0xECF5 5460 bytes
font_01_sfnt_off0000ff86.bin
46cd26a063e7b026d992526693656956df132fb6989ca662b33d59b303b65ca2
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF86 10660 bytes
font_02_sfnt_off000123e1.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x123E1 4324 bytes