Malicious PDF — malware analysis report

Static analysis result for SHA-256 8910bd788358ca61…

MALICIOUS

PDF

71.3 KB Created: 2021-02-28 08:24:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: d40103c4e5393453ad9b5d946dcbe223 SHA-1: 7fdd5d572759735cd2286d294ecc73ec57991840 SHA-256: 8910bd788358ca6158d289e6cab9ec1f61a20ade1c3d1ccd6aaf80e6e61bfd28
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'https://nipisod.ru/wix?keyword=naia+dakstats+softball'. This URL is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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://nipisod.ru/wix?keyword=naia+dakstats+softball PDF link annotation
    • https://guwuribi.weebly.com/uploads/1/3/0/8/130873976/puvotelowusilunesozi.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/how_many_carbs_in_a_taco_bell_beef_taco_salad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451374/normal_5ff91f778a8c0.pdfIn PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/70236723928.pdfIn PDF document text
    • http://wogivodugakovek.mygamesonline.org/what_ppe_is_required_for_a_warehouse.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378153/normal_5feb9dee7836f.pdfIn PDF document text
    • https://jarofipe.weebly.com/uploads/1/3/1/4/131408229/1979953.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/fotojipifuzitul/neuralgia_del_trigemino_elsevier.pdfIn PDF document text
    • http://ralirajuz.atwebpages.com/before_we_were_yours_detailed_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/analogias_numericas_ejercicios_resueltos.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/calculator_photo_lock_app.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/48604785862.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/ost_brilliant_legacy_only_you.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/vewuxupaturexaj.pdfIn PDF document text
    • https://s3.amazonaws.com/tixeligufokup/dark_souls_iii_cheat_sheet.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_off0000dbee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEE 4976 bytes
SHA-256: 9d6b7b338a0fad9a876d0053c01789bde73c7240724dca8584fb16de340205d3
font_01_sfnt_off0000ecf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF7 10400 bytes
SHA-256: 7d1a37d12df0e989a151c585f07b1dcbc7a800808a8a0024ca97775fca7a9417

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