Malicious PDF — malware analysis report

Static analysis result for SHA-256 2237f5269eb96148…

MALICIOUS

PDF

73.4 KB Created: 2021-03-23 20:45:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b3810d8b1b9cf739616afcce9a8bbaa SHA-1: 573fd1122c691af78d0b3a37e48c78ccb308b587 SHA-256: 2237f5269eb961485d5151a78fb8f13168952da429d8d88dfc3a69dc9f99b597
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text that appears to be a lure related to 'Sierra reloading data'. No scripts were extracted from this sample, but the presence of an external URI suggests it is intended to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://dafemum.ru/aws?utm_term=sierra+reloading+data+22-250
    • https://static.s123-cdn-static.com/uploads/4393189/normal_5ff6630aaef24.pdf
    • https://cdn-cms.f-static.net/uploads/4374839/normal_603eb1290d0cf.pdf
    • https://static.s123-cdn-static.com/uploads/4450721/normal_5fcd5ba0d962b.pdf
    • https://cdn.sqhk.co/kogujipubap/didgfjg/73268745262.pdf
    • http://gatofupimekow.mywebcommunity.org/archicad_21_user_guide.pdf
    • https://cdn-cms.f-static.net/uploads/4387920/normal_5fd615112607f.pdf
    • https://cdn.sqhk.co/rifojimuna/mb8nwii/dime_como_olvidarte_letra_rakim_y_ken-_y.pdf
    • https://cdn.sqhk.co/jasowipe/s0whfTz/hatchimals_colleggtibles_list_season_6.pdf
    • https://cdn.sqhk.co/dawadetugas/gbbPhbE/download_carx_drift_racing_2_mod_apk_pc.pdf
    • https://cdn-cms.f-static.net/uploads/4381082/normal_6020b4e011ba4.pdf
    • http://sevowina.medianewsonline.com/35809786332.pdf
    • https://static.s123-cdn-static.com/uploads/4448727/normal_5ff78170797ba.pdf
    • https://cdn-cms.f-static.net/uploads/4422894/normal_5fe7af2cf3384.pdf
    • https://static.s123-cdn-static.com/uploads/4475863/normal_5fffc3735f8df.pdf
    • http://totaxusozavu.sportsontheweb.net/mercruiser_5.7_service_kit.pdf
    • https://cdn-cms.f-static.net/uploads/4369654/normal_60545546d4ed5.pdf
    • http://zesegalos.scienceontheweb.net/47085691714.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1c4a310c-8f5c-464a-9a00-043eaaac54f3/does_renesmee_and_jacob_get_married.pdf
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_c18eb2a03890458d850bd957c25832e9.pdf?index=true
    • https://d429d46a-6203-486b-8c9d-ede5597e1383.filesusr.com/ugd/419b00_3c702dd8d72c45f08544e5ac1bbc44b3.pdf?index=true
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_73259e4656c3401db33f4208c5e54968.pdf?index=true
    • http://jopubijako.atwebpages.com/elements_of_literature_fifth_course_answer_key.pdf
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_dd2b70c7add4462cbe412c78edc89230.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0cc23e04-dff0-4ef7-8eec-35c60d8bed62/how_to_program_ge_timer_model_15079.pdf
    • https://uploads.strikinglycdn.com/files/082cc01f-378c-4517-b069-cac8194617e1/funiniz.pdf
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_4e879a4a19714088b915afc55457dbbd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/27fc4189-cf7c-4b59-823e-20dc8294d708/how_many_viewers_does_newsmax_tv_have.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0b1.bin
1b1392ad167b38fd499b9636f145fd951f3866fb2e7f095c7f4583f3da95d189		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B1 5348 bytes
font_01_sfnt_off0000f2f3.bin
067d9f6d0e17d5fadabf99411297d9dda4a86135d3a17f15c6374090f42eb134		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F3 10380 bytes

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