Malicious PDF — malware analysis report

Static analysis result for SHA-256 acdbdc927fdd97c5…

MALICIOUS

PDF

75.7 KB Created: 2021-03-09 18:20:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 22247484e73326c502420a951428729f SHA-1: f03706497874423415389a9e043e8f82e46fa5dc SHA-256: acdbdc927fdd97c5066d777d67a025986abbbc3abedb2fda48cec532b6272187
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://baarspo.ru/123?utm_term=bangers+beans+and+mash+piano+sheet+music', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to 'piano sheet music'. No scripts were extracted, but the PDF structure and embedded URLs indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://baarspo.ru/123?utm_term=bangers+beans+and+mash+piano+sheet+music PDF link annotation
    • https://cdn.sqhk.co/pabopimi/ih1Ybia/basubojajamurad.pdfIn PDF document text
    • http://instapriz24.site/54899430955pus2v.pdfIn PDF document text
    • http://rapovufasirave.iblogger.org/jekurapegaxa.pdfIn PDF document text
    • http://redtea.space/88288233327486ue.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/hhii72G/75371638853.pdfIn PDF document text
    • http://fosijez.22web.org/biochar_adalah.pdfIn PDF document text
    • https://cdn.sqhk.co/vemegunir/a16ighd/69001564488.pdfIn PDF document text
    • https://cdn.sqhk.co/dipasupor/BQ5ROid/80077486304.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/ijR2Fhj/best_free_offline_pc_games_2020.pdfIn PDF document text
    • http://copyrightreports.com/guronodisesipikapafezok3l63f.pdfIn PDF document text
    • http://betmoy54.com/giludinu5zdfc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sinadi/kenotumalakejado.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/which_of_these_is_a_good_example_of_heat_transfer_by_radiation.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/swellnet_cronulla_surf_report.pdfIn PDF document text
    • http://rarezutawuwelam.epizy.com/what_is_a_matrix_organization.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/amazon_suspension_appeal_letter_template.pdfIn PDF document text
    • http://movutep.rf.gd/define_social_justice.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/50532009851.pdfIn PDF document text
    • http://kisomelug.rf.gd/sixikasuvibusoserej.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/handwriting_worksheets_maker.pdfIn PDF document text
    • http://turimovikukori.epizy.com/komplikasi_gastroenteritis_akut.pdfIn PDF document text
    • http://voxokemawabam.rf.gd/star_wars_heir_to_the_empire_trilogy.pdfIn PDF document text
    • http://xovuxeke.epizy.com/webinupaguvosiwogev.pdfIn PDF document text
    • http://fuvituze.epizy.com/mlbb_esmeralda_guide.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCBE 5524 bytes
SHA-256: f49d266660b33ba05c1dc9b28ba721fc50cfe4a400f1b831b54fc2d4f9c54e15
font_01_sfnt_off0000ef4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4F 10592 bytes
SHA-256: 547955ec2e0aa0f2ce1f74760eb6f9a542c9237ffe571b71c26bc8c4bd31108c
font_02_sfnt_off0001131b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1131B 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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