Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da6a7353d4f61f2…

MALICIOUS

PDF

92.7 KB Created: 2021-02-23 03:30:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 03da77cd62a303e25c11bfbffb898858 SHA-1: 58ec0559a3bd19e82b722eb6a3219d9b8cd359a3 SHA-256: 6da6a7353d4f61f215b3864b94a9e0be95b610d2dc49227eb0e1b7ab074e5fdd
96 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to 'maypoin.ru', which is likely a phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, consistent with phishing or malware distribution.

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://maypoin.ru/123?utm_term=the+enemy+charlie+higson+wiki PDF link annotation
    • https://cdn.sqhk.co/lejesapazud/id9jixL/animals_and_their_homes_worksheet_for_kindergarten.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofebiziv/zagh9ib/death_star_gunner_vintage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_6017816d61ec0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495997/normal_60225311d73c2.pdfIn PDF document text
    • https://cdn.sqhk.co/lululitoj/jh7hdhb/july_14_2020_election_texas_ballot.pdfIn PDF document text
    • https://cdn.sqhk.co/nusideja/h5iisgd/67692052232.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lejubegow.epizy.com/chromatography_types_and_uses.pdfIn PDF document text
    • http://pevoxino.epizy.com/sierra_60_gr_tmk_223_load_data.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/finding_volume_of_cuboids_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/elevador_de_cangilones_calculos.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/rekenilisukuguwiw.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/fidapiponufifivagoxase.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/13674468500.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/free_printable_taps_sheet_music_for_trumpet.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/68548940317.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00013460.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13460 27560 bytes
SHA-256: f396c3a3bf92da8e2917e5c5965a2cd99a77873fb05bf927c332646821c7fee2
font_00_sfnt_off0000fbf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF5 5420 bytes
SHA-256: 2685ee821b125d27ea9f23150898095659bb58a48e7eb82bbe5aef997f3aa68b
font_01_sfnt_off00010e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4E 11240 bytes
SHA-256: 7cbcbaff169b8e82d306132dfb39b78d1d56c27a27d7baf25cc05a1d1afc31ad

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