Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe71bffc9e5e682…

MALICIOUS

PDF

154.4 KB Created: 2021-03-16 03:17:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c610f8e6861e0fca17666a4e0df4ec90 SHA-1: d9d8ae97ca3b5e96eaf88d339beac501ff31e5c6 SHA-256: 3fe71bffc9e5e6821a9d243646762f93b8b66826edc4e63902741aba47f21487
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to deliver a secondary payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to an "engineering economy" solution manual.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/wix?keyword=engineering+economy+14th+edition+solution+manual+pdf
    • http://electriccannoz.club/is_it_safe_to_put_crystals_in_candlesc4k7r.pdf
    • http://belkwigs.com/dibevoriregojigilesidi09ktg.pdf
    • http://bossyonlinex.com/mortal_kombat_11_switch_pricee3k8b.pdf
    • http://mandarin-fruit.space/wukejusuxzfy11.pdf
    • http://circleshtang.xyz/daily_language_review_grade_5_worksheetssu43q.pdf
    • http://groshyk.site/masterbuilt_electric_smoker_chicken_quarters90yyj.pdf
    • http://springtea.space/vipojusazobinilafibuee5lx.pdf
    • http://eyebrowthreadingdallastx.com/61551030508afs6.pdf
    • http://goldstein.capital/what_is_the_word_for_5_timeswl4c8.pdf
    • http://ru-dev.xyz/onkyo_tx_sr608_receivertnp5k.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f3fce357-85d8-42c2-8b8c-350ce935213e/xepitedug.pdf
    • https://uploads.strikinglycdn.com/files/b25ff497-f25a-40a7-abd8-d0ec584b49f4/hp_laserjet_1100_cable_adapter.pdf
    • https://uploads.strikinglycdn.com/files/63ea0811-b361-4365-9b8c-d654637d795b/how_to_email_starbucks_customer_service.pdf
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_bfcc71b54d37469baa55b1f8b4be5d62.pdf?index=true
    • https://d0275d90-c5b4-4c72-b581-d0e2b62fc6dd.filesusr.com/ugd/ee54da_6f939575e1fb4f7f9788f47d077a9330.pdf?index=true
    • https://s3.amazonaws.com/fedure/bosch_nexxt_500_series_dryer_troubleshooting.pdf
    • https://s3.amazonaws.com/wupixufekijax/traffic_report_i_90_west_new_york.pdf
    • https://s3.amazonaws.com/megujobemegor/destiny_2_shadowkeep_light_level_guide.pdf
    • https://uploads.strikinglycdn.com/files/9fed2c95-8fec-4078-803f-47b21ed6a992/telitomowetotizow.pdf
    • https://uploads.strikinglycdn.com/files/dcd2316a-1764-4941-a1c3-3bf0e4e780e7/15689084739.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_off000202f1.bin
7e9060d686775522e4640d06f4dbc1f8a5dc16bed4fd8d5383b19c7bca755bb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x202F1 8768 bytes
font_01_sfnt_off00021bb4.bin
b7c442046fd4952a07489448fb638bdf2fd2f5d8b692052a8081479f470ad4bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x21BB4 5768 bytes
font_02_sfnt_off00022f47.bin
559c534f2f34967cabb361393306d23cdd576779aa776d02755653a0d6c94c1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x22F47 12788 bytes

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