Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6e36b5d841ffb0…

MALICIOUS

PDF

78.8 KB Created: 2021-03-26 04:40:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b2bcfbbe70c5379bb09045f630825a2 SHA-1: b5d4a7326f67798d9da3e27ce702a3038424d6cc SHA-256: cf6e36b5d841ffb09df46dfb793feb6f146ea6dbf4433fb969e07bb7f29a9bd0
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that directs the user to a malicious website, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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=b1+motion+in+one+dimension+answer+key
    • http://regsenatvumen.website/vovipoguxiku42pwv.pdf
    • http://dkblogin-de.best/baby_girl_names_in_spanish_2019qlkh7.pdf
    • https://static.s123-cdn-static.com/uploads/4421200/normal_5ffcbc9684448.pdf
    • https://cdn-cms.f-static.net/uploads/4388048/normal_60295b6c76c01.pdf
    • http://lovemecompletely.com/building_construction_civil_engineeringfzr5i.pdf
    • https://cdn-cms.f-static.net/uploads/4478137/normal_5fe634d831843.pdf
    • https://cdn-cms.f-static.net/uploads/4465924/normal_603d520c7145e.pdf
    • https://cdn-cms.f-static.net/uploads/4481069/normal_6024528d0d5dd.pdf
    • https://cdn-cms.f-static.net/uploads/4413118/normal_6059589c931db.pdf
    • http://reassurez-moi-fr.info/kiwekanegomccb1.pdf
    • https://static.s123-cdn-static.com/uploads/4479691/normal_5fe5e0dfd3813.pdf
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5fe91c5455d2b.pdf
    • https://cdn-cms.f-static.net/uploads/4491687/normal_602e8181bfc37.pdf
    • https://static.s123-cdn-static.com/uploads/4386080/normal_5fce95af179ce.pdf
    • http://youtube-subscribes.com/agatha_christie_endless_night_downloadhe3in.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f3e0ee59-b309-4736-aefa-1db4f942b0be.filesusr.com/ugd/e87662_8d50da35ca424d17894de38072915e5b.pdf?index=true
    • https://4c72699b-aa2e-4dc8-8bd5-1a54e8f938a6.filesusr.com/ugd/f3cb45_6e2e1d43c2df4e439956e6e32a4b44f4.pdf?index=true
    • https://b0c090b1-cb02-46d8-8a69-3fb9d82636b6.filesusr.com/ugd/4dbf3f_43ee688aaaf047a98040bd6b955df4fb.pdf?index=true
    • https://229c3593-bb94-4e5d-9b9f-ca3747df48ef.filesusr.com/ugd/145364_9ba6a204fbd94b9d9bc80d9c1c8095b3.pdf?index=true
    • https://s3.amazonaws.com/dutimajizowa/teori_marxis.pdf
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_9e57cf29d7e64f82869f9b2d74806848.pdf?index=true
    • https://s3.amazonaws.com/nevovumowa/viragebixakifujomujuja.pdf
    • https://48e4e0df-78ce-4736-8797-27735e68dc67.filesusr.com/ugd/f3b179_60ba0019d2754990ba5dda615d33d6b7.pdf?index=true
    • https://9a4b5e96-23fe-4021-9525-787506808755.filesusr.com/ugd/b3318b_f766441aa42443ddb5e35e150c9f2d40.pdf?index=true
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_c3276c90bd644d99a33b0a2345d42bd0.pdf?index=true
    • https://s3.amazonaws.com/wesezuzuvalirik/aquarium_game_free.pdf
    • https://s3.amazonaws.com/zafijukopa/level_1_korean_grammar_textbook.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_off0000f693.bin
1303872908bf693f7de48c60371b4956100773006a746546cd68894b4b5f30ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF693 5296 bytes
font_01_sfnt_off0001089e.bin
e039d92c836e44f960c57dd85e291b03defb3707729b78c8a28eec5954720f51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1089E 10592 bytes

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