Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a4135acc65fd953…

MALICIOUS

PDF

76.6 KB Created: 2021-05-22 02:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 9b2931793942c2a3e590265481810884 SHA-1: 2823b5c97494a1785c52e926ea8f29ef9ee3d422 SHA-256: 1a4135acc65fd953ab3b879570344f72cd2db0da9c8fcc542a938cabd34e9f97
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL leading to a phishing site. The document body, though heavily obfuscated, appears to be a lure related to 'Vikings season 2 episode 5 cast'. ClamAV and ML classifiers strongly indicate maliciousness, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/strik?utm_term=vikings+season+2+episode+5+cast PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458148/normal_602c51ecf3186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421205/normal_603f6a215133d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445739/normal_6029396a85dc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374199/normal_601a821aa8432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384644/normal_602ca6ca96fa3.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/vuzufexarevima/hplc_method_development_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1353d8a-7fd6-4b9d-91ed-48bd667aedf8/1255072251.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/creepshow_1982_full_movie_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b65a0be9-a6ec-4a2c-b3b9-ad01c5803b13/xorodelulodevenuda.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/yamaha_mg24_14fx_review.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/judepawedevijexode.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/manually_balance_lipo.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/bonawebiwivopofegelubig.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/subigak.pdfIn PDF document text
    • https://s3.amazonaws.com/gusule/26849882581.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/bejafo.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/free_bible_tagalog_version_for_laptop.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/witutafineruzivetikewot.pdfIn PDF document text
    • https://s3.amazonaws.com/filidabut/technical_interview_preparation_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9C 5396 bytes
SHA-256: 3828c59278266fb681724680d354d3b96049550e4602f97c99ef650029b36489
font_01_sfnt_off00010023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10023 10540 bytes
SHA-256: 9d455a49dd7d9a41b67f62b1049d5d117909f4d7ed53bcb87e14cf0a283173fb

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