Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff58e8b3939136eb…

MALICIOUS

PDF

106.9 KB Created: 2021-04-23 06:08:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cb348a4be822685a48871a4daa3b2576 SHA-1: cee1c652384ff5b877b28017c2c1603f3fb5c34c SHA-256: ff58e8b3939136eb626ea4cb9d01423e091c53dff032fb3579a12ae9f5a60a95
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 URL that directs users to a suspicious domain, likely to facilitate a phishing attack or download further malicious content. The document body, though heavily obfuscated, appears to be a lure related to a dictionary.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/strik?utm_term=idiomatic+cambridge+dictionary PDF link annotation
    • http://mabixegegixalez.22web.org/maths_practice_questions.pdfIn PDF document text
    • http://pixuvuxojatob.iblogger.org/nevuzum.pdfIn PDF document text
    • http://zawugexoj.22web.org/lesixitojowobadedip.pdfIn PDF document text
    • http://gasiwine.iblogger.org/52655843589.pdfIn PDF document text
    • https://cdn.sqhk.co/vobevufubito/5TrggPZ/vijejedakisafaxoxudetije.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/igjogi7/nixotaxap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_26fefea151ca4a1f8d508edffca47530.pdf?index=trueIn PDF document text
    • http://gofusunoko.rf.gd/riposidazel.pdfIn PDF document text
    • http://tiborumaroxotob.rf.gd/why_has_my_samsung_fridge_freezer_stopped_making_ice.pdfIn PDF document text
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_828bfcb050db4217b0a8bb0ba45ccdcc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/canon_mp250_ink_cartridges_argos.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/fosisu.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/ssbu_bowser_jr_guide.pdfIn PDF document text
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_1afd3357b7424204adbe3d94fd106edf.pdf?index=trueIn PDF document text
    • http://bikaduwixunu.epizy.com/behringer_deepmind_12_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/xobixusugaruwexufalibi.pdfIn PDF document text
    • http://luwegovufa.epizy.com/18948147829.pdfIn PDF document text
    • https://a7563df4-ba19-4d82-a8a0-b2470d957038.filesusr.com/ugd/61f964_e6929ab623e1455b8936ef03795f7300.pdf?index=trueIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_f559e90e75bf474eb228c088e75e1850.pdf?index=trueIn PDF document text
    • https://681956c7-2c57-495f-b996-d04b50c745b0.filesusr.com/ugd/907d98_a42d043791a64f6f9b59abf937e8fd53.pdf?index=trueIn PDF document text
    • https://70fbc5f3-53e4-4072-9ff7-a5862d19847b.filesusr.com/ugd/bb3bf9_02cc0af35cd64b10ae5a7d8167ec7c32.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000145be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145BE 5016 bytes
SHA-256: 3d461441052f3239f421b47f283a03d3f121251445431b74f147a4bcbb92467f
font_01_sfnt_off000156a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156A8 6096 bytes
SHA-256: 5c8315477683aa1d3fd841116862019cbbba5c4771cd38d8881bbb85ed012e8f
font_02_sfnt_off00016658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16658 11664 bytes
SHA-256: 5c3acafa831d43783bb3df188b5770562d3e2743995b4a29c45ee4959830a2ff
font_03_sfnt_off00018dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18DFD 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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