Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60b6f0eccebaa25…

MALICIOUS

PDF

78.1 KB Created: 2021-01-22 00:20:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f21dc91f22d80c4f4a0650305d35f201 SHA-1: 9a7c96b5b635c1f0f09d7e40c3f0138c4b716bab SHA-256: c60b6f0eccebaa251a02f9f5c368e21dd87a6e9e1292e2d4fd9c0105d427950b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The primary URL, 'https://jottigo.ru/123?utm_term=spider+man+far+from+home+123+movies', indicates a lure related to popular movie titles to attract clicks. ClamAV and ML heuristics confirm its malicious nature, specifically flagging it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/123?utm_term=spider+man+far+from+home+123+movies PDF link annotation
    • https://lurusavi.weebly.com/uploads/1/3/2/7/132710630/pusapirakodelobi.pdfIn PDF document text
    • http://mosoxiliraf.iblogger.org/tim_hortons_donut_nutrition_guide.pdfIn PDF document text
    • https://kisetujetu.weebly.com/uploads/1/3/2/8/132814277/lemijanivutixafi.pdfIn PDF document text
    • https://vadezewojig.weebly.com/uploads/1/3/1/3/131379553/rivobuwakapofime.pdfIn PDF document text
    • https://pudexaxetodeli.weebly.com/uploads/1/3/2/6/132683251/ramuzuvawerikox_jukix.pdfIn PDF document text
    • https://site-1248801.mozfiles.com/files/1248801/java_android_game_development_libgdx.pdfIn PDF document text
    • https://site-1173456.mozfiles.com/files/1173456/80113204840.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/sefukirexuwekij/a_monster_calls_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/milady_theory_workbook_answers_chapter_12.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/4129387934.pdfIn PDF document text
    • https://s3.amazonaws.com/tojabixefova/cbre_market_report_stockton.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/wordscapes_answers_1041.pdfIn PDF document text
    • http://vukenorap.epizy.com/gejala_alternaria_porri.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/campbell_hausfeld_pressure_washer_1800_psi_manual.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_off0000f21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF21C 5760 bytes
SHA-256: 7edb5fd4199330150d17329614ff908d97bf3dde56282dcc4adb2f45be00bdb1
font_01_sfnt_off0001059a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059A 11176 bytes
SHA-256: d065cd8c9be8534af4c787a53a732d07af8d742b73c4328846d94b5c13187d1f

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