Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59cdef45a1cdfc5…

MALICIOUS

PDF

74.7 KB Created: 2021-03-16 00:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43074e989d19abdd5f92f5634e4d44b3 SHA-1: 703baa990fc087792bef698a84b1abeb75c66dd0 SHA-256: b59cdef45a1cdfc5c23ee53655eb6529083b7a36fea61f1cea69b8c770c0e097
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, indicating a high likelihood of malicious intent. It contains an embedded URL that, when visited, likely leads to a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'Immigrants and urbanization worksheet answers', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/wix?keyword=immigrants+and+urbanization+worksheet+answers
    • https://cdn.sqhk.co/radofufalam/iejaeLN/dark_side_of_the_moon_paul_kelly_lyrics.pdf
    • https://cdn.sqhk.co/kezomerameki/bhfgdig/exiled_kingdoms_rpg_full_apk_cracked.pdf
    • http://tuwuneluzuso.22web.org/algorithms_in_a_nutshell_in_a_nutshell_oreilly.pdf
    • http://figojusu.iblogger.org/12041242391.pdf
    • https://cdn.sqhk.co/relulapezele/hdMgfic/18867326398.pdf
    • http://zojulosopejozaz.iblogger.org/96061512548.pdf
    • https://cdn.sqhk.co/bitaxukezor/9Thdric/baseball_9_innings_2011.pdf
    • https://cdn.sqhk.co/tawibonikigo/fWhgq0m/dipogobejusozenoziteg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://28481333-1ef2-46fb-8ebf-d56c3f24acbc.filesusr.com/ugd/314c35_7a5cc14193af49448af5a73ee76dbde8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a6643309-a555-4f91-8995-817e9bf6d429/whirlpool_duet_steam_dryer_making_screeching_noise.pdf
    • http://romezegipoxo.epizy.com/artex_elt_tester_manual.pdf
    • https://uploads.strikinglycdn.com/files/7bfb2ef2-681b-4f56-8239-ee9ce53e3720/zotesemuwaxujimavubelaro.pdf
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_0cdbd3756ba547c2ac290a0d07820f7b.pdf?index=true
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_5807717e218f40f18aca959c418da282.pdf?index=true
    • https://a91873a8-1f5b-4151-915d-af39eb211f25.filesusr.com/ugd/3f80ec_3dcfaedd7ced4dfeb1e12fc84854588c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fdbaa7f4-81b8-49cd-8c39-a7fbac4e1a48/sat_tests_near_me_2021.pdf
    • http://zekakodususebu.epizy.com/integrated_mathematics_1_textbook_answers.pdf
    • https://6ec3981f-6443-463b-a164-91fc69f101d9.filesusr.com/ugd/7603ae_743f9b956495444397e966e327520135.pdf?index=true
    • https://0f7a2101-273c-4f7f-b1fd-079d1ad923c1.filesusr.com/ugd/a7ea6f_f6cfd8993a9844048cc46fb88fcf41d1.pdf?index=true
    • https://uploads.strikinglycdn.com/files/1ecd0988-903c-431a-9222-6b62d0bb102c/nalafapepepeb.pdf
    • https://uploads.strikinglycdn.com/files/7893d442-a0f8-4471-b766-cfd0effba9c8/63759446571.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_off0000e5fa.bin
de56c9ed406c877ef824efe8f2a69fc7dd8a31dbc8b1e7cc784cebcd1cc9dd05		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FA 5488 bytes
font_01_sfnt_off0000f892.bin
953f5d02599f05ac6545f5ad2fb1cc43150fe745d8c1984018712997930eaf5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF892 10836 bytes

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