Malicious PDF — malware analysis report

Static analysis result for SHA-256 76437626a8c704c3…

MALICIOUS

PDF

78.6 KB Created: 2021-06-07 00:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 648aff64f434d24e4c39380c30514150 SHA-1: 9b6126892fa8fa072d4cc66fa5ba7f5cb5fa4023 SHA-256: 76437626a8c704c376502e19a59e37a57752e8f922ff1bb97fceb2a2b5292109
96 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, https://queure.ru/pbw?utm_term=bsc+maths+1st+year+books+pdf+free+download, suggests a phishing or social engineering lure, likely attempting to trick users into downloading further malware under the guise of academic resources. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://queure.ru/pbw?utm_term=bsc+maths+1st+year+books+pdf+free+download
    • https://static.s123-cdn-static.com/uploads/4446026/normal_5ffb89fa01395.pdf
    • https://zufulakoloti.weebly.com/uploads/1/3/5/3/135301661/4026213.pdf
    • https://cdn-cms.f-static.net/uploads/4379038/normal_606da4250c4e4.pdf
    • https://cdn-cms.f-static.net/uploads/4365626/normal_601d24615528a.pdf
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/melixaj-tasejamazot-nukimumaxe.pdf
    • https://webavetoromezo.weebly.com/uploads/1/3/5/3/135346546/6675504.pdf
    • https://vixeregipidodig.weebly.com/uploads/1/3/4/5/134592438/7f69ec44a43.pdf
    • https://cdn-cms.f-static.net/uploads/4409610/normal_605a1b8f2117f.pdf
    • https://cdn-cms.f-static.net/uploads/4427104/normal_60151ca70124e.pdf
    • https://cdn-cms.f-static.net/uploads/4485435/normal_60400d9b2726d.pdf
    • https://static.s123-cdn-static-d.com/uploads/4476783/normal_60b7184e54fc1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cb41f05c-e4ec-447e-b947-529308c705ca/40255321312.pdf
    • http://molitutolu.pbworks.com/f/83329350581.pdf
    • http://vugufosenene.pbworks.com/f/97817450678.pdf
    • https://uploads.strikinglycdn.com/files/0872c28b-b051-4a5b-8c84-20f83480318e/how_to_record_sale_of_vehicle_in_accounting.pdf
    • https://uploads.strikinglycdn.com/files/9441183f-345b-4346-a815-13d366cf924f/what_happens_to_ahsoka_after_season_5.pdf
    • http://ruwomodanom.pbworks.com/f/4441963438.pdf
    • http://wisarazed.pbworks.com/f/how_to_level_up_fast_in_bloons_monkey_city.pdf
    • http://zalonuzojeru.pbworks.com/w/file/fetch/144449883/26823690932.pdf
    • https://uploads.strikinglycdn.com/files/ab5ea3a1-e2aa-4057-86d1-b6f9c5711da8/treasure_island_book_free.pdf
    • https://uploads.strikinglycdn.com/files/06c584b5-f295-4f3c-a324-0961ab613fa2/relative_pronouns_exercises_pre_intermediate.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_off0000f077.bin
babb226a4b6d6a247232d93bf2934d873e19227c537b12612afcf64b9911e383		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF077 5892 bytes
font_01_sfnt_off00010478.bin
804556f8af6238d18d47695ecf33ff379243a76644838be39b981e8215abf27f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10478 11288 bytes

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