Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a3e8c454d160998…

MALICIOUS

PDF

79.8 KB Created: 2021-02-20 12:41:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dccfc95cecff6c0f80d2009f1da5c8b4 SHA-1: 1046cd77fb2d3e479a04a679f4160bfd41253577 SHA-256: 8a3e8c454d16099833262beff98821d88b9b09644fd0d7ea726f1c7568f489b4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, appears to be a lure related to a Maytag washer error code, likely intended to trick users into visiting the malicious URL. The presence of multiple embedded URLs and the ClamAV detection further support its malicious nature, likely as a phishing or malware distribution attempt.

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://maypoin.ru/123?utm_term=what+does+f28+mean+on+my+maytag+washer
    • https://cdn-cms.f-static.net/uploads/4492593/normal_6030998b1539f.pdf
    • https://cdn.sqhk.co/difigobon/9ILgcR5/mujiweravogokedibasot.pdf
    • http://repair-kompov.ru/sat_prep_test_10_answersbgvwm.pdf
    • https://cdn-cms.f-static.net/uploads/4417032/normal_5fd3be09df8dd.pdf
    • https://cdn.sqhk.co/pozusonitid/ggifvtW/road_rage_meaning_law.pdf
    • http://sayseedokg.com/cmos_analog_vlsi_designlj4ip.pdf
    • https://cdn.sqhk.co/sovokeduseb/gzgiRgj/baxivobibafilexe.pdf
    • https://cdn-cms.f-static.net/uploads/4490121/normal_601fcfaab6fc7.pdf
    • https://cdn.sqhk.co/guxuboru/oANgfgf/electric_guitar_tuner_microphone.pdf
    • https://cdn.sqhk.co/kuzetuzame/icighue/one_gotta_go_soul_food.pdf
    • http://littlenat.space/zozetalolojogi9m7ex.pdf
    • https://cdn.sqhk.co/vakamuzawa/cP8gepC/block_craft_3d_online.pdf
    • http://1xbet-registrat.site/boutonniere_deformity_xray6w00s.pdf
    • https://cdn.sqhk.co/delojiwuguj/2hbieii/52756888786.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://daxepusiz.rf.gd/slope_stability_analysis_excel_sheet.pdf
    • http://jedalavupu.epizy.com/dls_2020_mod_apk_data_obb.pdf
    • https://s3.amazonaws.com/rezugekolaba/magepununaver.pdf
    • http://botuwosolu.rf.gd/alone_movie_all_songs_pagalworld.pdf
    • https://s3.amazonaws.com/xuzed/jazaruwanosawiwile.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_off0000edc4.bin
1edf501179f784fe50a2e3ef5b0e9ebbee763dce499883d5b45bd74ed3a6566e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC4 5560 bytes
font_01_sfnt_off0001009d.bin
c7816e0c4429981a8b8fe782099733424449283d2d77134a6ad530042c00e4aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x1009D 10240 bytes
font_02_sfnt_off00012389.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x12389 4324 bytes