Malicious PDF — malware analysis report

Static analysis result for SHA-256 88fd8a7179f9f65e…

MALICIOUS

PDF

163.8 KB Created: 2021-03-15 13:15:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec3ab1e720eda7714ed3f8cf6ecd7e78 SHA-1: e9473bb7079457fbb708febbe065bed7b08f978c SHA-256: 88fd8a7179f9f65ed89b7cb8d66ff1f2c94af063dd9c48f1972273f0b643700a
116 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to a site offering a "Playstation plus free trial code generator", which is a common lure for phishing or scamming. The document body, though heavily obfuscated, contains references to the URL's keyword and the authoring application, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://zajinet.ru/wix?keyword=playstation+plus+free+trial+code+generator
    • https://cdn.sqhk.co/penomufepuk/ehhghHZ/xewibu.pdf
    • https://cdn.sqhk.co/tegatiwuwax/bE8jdij/harkins_movies_times_near_me.pdf
    • https://cdn-cms.f-static.net/uploads/4453721/normal_604eba3aa98cf.pdf
    • https://cdn-cms.f-static.net/uploads/4410678/normal_602c51b6a4568.pdf
    • https://cdn.sqhk.co/rarukaboz/Lgehfgh/multiplayer_driving_simulator_mod_apk_2018.pdf
    • https://cdn.sqhk.co/rajemaramiw/1gi2ihS/xikaruxalipoparavupol.pdf
    • https://cdn.sqhk.co/melipetoluf/2WmjjTy/5_dollar_pizza_deals_near_me.pdf
    • https://cdn-cms.f-static.net/uploads/4465556/normal_5fdb7ca5489ce.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/0a1bed0d-e4d5-438b-b54c-44a949369035/clockwork_prince_series.pdf
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_2a45dcf0114444998853083666d8f8f4.pdf?index=true
    • https://80b2a579-f9ed-4aa0-b91a-ac3c8973c086.filesusr.com/ugd/353d00_c1d56246150d4c658c744b7b28578e04.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fa7917da-0308-42f3-b9e9-84b7e35dc277/37909313289.pdf
    • https://uploads.strikinglycdn.com/files/7550bdd1-7834-42fa-b751-080554a24eb4/sat_math_practice_varsity_tutors.pdf
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_2c820e34ba2f4f848705fc5128126f27.pdf?index=true
    • https://uploads.strikinglycdn.com/files/c9925868-66c9-4395-a41c-9b981a422d6d/death_from_above_airborne_motto.pdf
    • https://uploads.strikinglycdn.com/files/b4150fec-f4a5-414f-81cb-8f93759333f7/fujitsu_fi_6130z_twain_driver_download.pdf
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_220c24660e364557b8d0194acf692cb8.pdf?index=true
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002441f.bin
e136288595bc2914e4f3313c227da1307709a5f6ec759d3af13d6c5b1f0f6ec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2441F 5428 bytes
font_01_sfnt_off000256b2.bin
12ad0edefd1caeac1ee8b72690b6059167d495e42993b183f098a457c094eed6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x256B2 12488 bytes

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