Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb732b0bd2f5676…

MALICIOUS

PDF

94.0 KB Created: 2021-03-20 03:24:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d049bbb63d988b3343857a87c1e98019 SHA-1: 2325e4e97a952ed41b7f3afbaab3a3383021a10f SHA-256: 0bb732b0bd2f5676fb946124c0a6970e889b7b595fdbb74903e75836425c7a4d
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains keywords related to 'worksheet answers' and application metadata, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/wix?keyword=icivics+rule+of+law+worksheet+answers
    • https://cdn.sqhk.co/wepunajexiju/cIghheG/download_skin_editor_3d_for_roblox.pdf
    • https://cdn.sqhk.co/rorezina/gihifs1/11646939353.pdf
    • https://cdn.sqhk.co/wifinalimow/jeGKCih/santa_basic_amusement_park_education_and_learning.pdf
    • http://zitirisiz.mywebcommunity.org/historical_criticism_in_literature.pdf
    • https://cdn.sqhk.co/vozeseseber/fihpuWy/omnitrix_assault_ben_10.pdf
    • http://numulul.mygamesonline.org/12687853047.pdf
    • http://juwupexutaval.mywebcommunity.org/christmas_carol_songbook_printable.pdf
    • http://davupopebuwiser.sportsontheweb.net/fusionner_2_pages_en_une_seule_page.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xizevobawilu.epizy.com/latest_bollywood_full_movies_free_2019.pdf
    • http://nudifezidezi.rf.gd/bakajoxali.pdf
    • https://uploads.strikinglycdn.com/files/a535bca2-3a15-4fdb-8140-dc8886e1926e/narulilasegolow.pdf
    • http://tobobuximalusu.epizy.com/iadr_poster_guidelines_2018.pdf
    • http://pejemevogoge.myartsonline.com/oxford_medical_english.pdf
    • https://s3.amazonaws.com/bededuxotulapil/types_of_ventilator_modes_ppt.pdf
    • https://uploads.strikinglycdn.com/files/b5f8ef5e-3cbf-440c-b238-deef091ae788/xemeb.pdf
    • https://s3.amazonaws.com/lososimap/how_to_learn_ms_excel_formulas_and_functions.pdf
    • https://s3.amazonaws.com/firudegix/difference_between_nikon_sb-700_and_sb-800.pdf
    • https://s3.amazonaws.com/nuselufuzo/cut_out_back_formal_dresses.pdf
    • https://s3.amazonaws.com/xefejevife/addzest_max550hd_manual.pdf
    • http://kipixuge.epizy.com/kabalukebavaro.pdf
    • https://uploads.strikinglycdn.com/files/269386fc-8c18-44be-9f8b-876f03d81cd3/78632254615.pdf
    • https://uploads.strikinglycdn.com/files/c582c87d-e21e-45e9-a959-b60fb5169c9e/what_are_munchkins_made_of.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_off0001243f.bin
61946e05211f43a5109b5c98ba98218523f7c948d090c9e5d87dae56450f705c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1243F 5004 bytes
font_01_sfnt_off00013546.bin
7c746aa75ade953663ae67075974d8e35f3b8356680b0f6536d81448aeac6c2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13546 11352 bytes
font_02_sfnt_off00015be3.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15BE3 4324 bytes

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