Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7a7ecfdfd38090a…

MALICIOUS

PDF

82.1 KB Created: 2021-05-24 20:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 836af1f33f69779e57c499db33a36ba7 SHA-1: 9726597beffdecede3dda03fa9e41c5723ebf916 SHA-256: d7a7ecfdfd38090a2e6177c0a049125201ee258d02bcab8e833d613fb4dd85e6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=how+much+does+domino%2527s+charge+for+delivery+insurance PDF link annotation
    • https://rifonaro.weebly.com/uploads/1/3/4/6/134679964/tabodepiv.pdfIn PDF document text
    • https://gefaturulabi.weebly.com/uploads/1/3/4/4/134487578/jevesuvaluvudu_zoponitatukiv_xusinuxalakem.pdfIn PDF document text
    • https://kumumejetosen.weebly.com/uploads/1/3/0/9/130969188/tevupatokedebituxaxo.pdfIn PDF document text
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/2327939.pdfIn PDF document text
    • https://gamajebijapam.weebly.com/uploads/1/3/1/8/131856653/fakixafurum_movolesedig_bemobibuw.pdfIn PDF document text
    • https://pelosewedi.weebly.com/uploads/1/3/4/7/134753512/vedode-rakitesewemipaf-nujedapabadopo-futemu.pdfIn PDF document text
    • https://nadaroxiwe.weebly.com/uploads/1/3/4/6/134688146/d6eda27b48f3bf.pdfIn PDF document text
    • https://wexejapu.weebly.com/uploads/1/3/1/3/131384175/3157796.pdfIn PDF document text
    • https://losewilim.weebly.com/uploads/1/3/4/8/134854933/9026028.pdfIn PDF document text
    • https://ruvezidarumova.weebly.com/uploads/1/3/1/3/131380493/eb62e8e18.pdfIn PDF document text
    • https://dikekivex.weebly.com/uploads/1/3/0/7/130775400/9673699.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/husqvarna_310_automower_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/how_bad_can_i_be_lorax_scene.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/3717238890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ff6806f-a9c9-4efb-95ef-2c43968dbf33/tivovip.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/23765768288.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/danir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/197433d8-43aa-4c8e-afcf-88c3a74876dc/59316611944.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51cbf53f-5192-4da8-aaf7-f1dc5c9ca229/study_big_data_analytics_in_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/brandt-_daroff_exercises_for_bppv.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/master_forge_grill_2_burner_price.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/dudibigagujakawonawariju.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/solucionario_del_libro_lgebra_lineal_y_sus_aplicaciones_3_edicin.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF05 5684 bytes
SHA-256: 7309b2ef8d55ed87ad76c29090d13b16a6e5ca8ab548be5e5c381254fae1dce5
font_01_sfnt_off00011254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11254 11252 bytes
SHA-256: c7ca5351fd5cfd2db626bc19cb9a03f4fdc007488705c8f6ef0221fc3ee8d5e8

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