Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f31974cd2ee180c…

MALICIOUS

PDF

74.4 KB Created: 2021-02-06 10:02:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: dbc1b08b33f3f58950f1e2576ae8a078 SHA-1: 6e212543ae8757227a5fa364ed1368f19d41c66a SHA-256: 9f31974cd2ee180c3a01180ed0a9abd1ee4e9fdebfc67fe72edbf46791493ea6
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/aws?utm_term=information+about+indian+navy+mr'. This indicates the document's primary purpose is to lure users to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/aws?utm_term=information+about+indian+navy+mr In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_601dfa127013e.pdfIn PDF document text
    • https://cdn.sqhk.co/pivokazi/jehgiek/98795867002.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxugaveg/gdAQhgL/35886594347.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/mawesenasijoser/29865230799.pdfIn PDF document text
    • http://jajoxutevo.epizy.com/25885762543.pdfIn PDF document text
    • https://s3.amazonaws.com/defujo/resumen_antes_de_que_sea_tarde.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/embraceable_you_sheet_music.pdfIn PDF document text
    • http://wobemiko.epizy.com/93267628244.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/hillsboro_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/95842203334.pdfIn PDF document text
    • http://zipoxibel.epizy.com/acc_aha_guidelines_2017.pdfIn PDF document text
    • http://bupomejov.epizy.com/malayalam_spoken_english_book_free.pdfIn PDF document text
    • http://famefikapipu.epizy.com/guide_michelin_restaurants_ile_de_re.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/diet_guidelines_for_anticoagulant_therapy.pdfIn PDF document text
    • https://s3.amazonaws.com/tawovojo/fruit_salad_wiggles_sheet_music.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_off0000d8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8EB 4848 bytes
SHA-256: 277beb466d95112659ea3a516f67de9f38fdf83101e40b90e3ada3118d254bbd
font_01_sfnt_off0000e93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93F 11044 bytes
SHA-256: 47b7b0a1117cf79fe2cafb702dcea9b53ddd36123b06aaa992a2b58a16887a16
font_02_sfnt_off00010ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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