Malicious PDF — malware analysis report

Static analysis result for SHA-256 2137fe08e25a33cb…

MALICIOUS

PDF

79.8 KB Created: 2021-02-20 12:08:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2ed2d4d901b537800d5a0492e489b680 SHA-1: d2d0c036691a2f5b56551cc5245ce25eeb28125a SHA-256: 2137fe08e25a33cbadb4f7d8b5d3e9914a5c428bdd3a5b9fb787439e132f7442
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://crophysi.ru/123?utm_term=berserk+manga+release+date+2020'. This URL is likely used to lure the user to a malicious site. The ML classifier also flagged this PDF with a high probability of being malicious, and ClamAV detected it as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the presence of a malicious URL strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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://crophysi.ru/123?utm_term=berserk+manga+release+date+2020 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4452837/normal_5feb1683a4e1e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371269/normal_5fd110a39acd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467286/normal_600e68440dd25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376621/normal_602e7eb1dc7f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446759/normal_5fe8d6b76bac2.pdfIn PDF document text
    • http://jubuvojikemipi.iblogger.org/regions_in_the_philippines_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481155/normal_60176036cd24e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462992/normal_600478532b0e3.pdfIn PDF document text
    • http://lamorebeduzakoj.22web.org/rowebejafot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374207/normal_5ff693f61040b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489411/normal_5ffa865faf3eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368467/normal_6001c6486f088.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374979/normal_600d5e298b98a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372682/normal_5fe83237bfc4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393514/normal_5ff35f0155119.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/fexuror/xopozenotunuto.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/nonazotumi.pdfIn PDF document text
    • http://vonanovab.epizy.com/information_about_taj_mahal.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/anari_movie_song_1993.pdfIn PDF document text
    • http://lisiguzaxupego.epizy.com/74986105729.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF42 3616 bytes
SHA-256: 1c97d6dde2eeac61052249735675eba7f8ca2a3175c490edb43bfcee642ea31a
font_01_sfnt_off0000ec28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC28 5164 bytes
SHA-256: a51910a1dfea95e67b32e5db59ae83d93fd044520d163ae48d65aa4423e40be2
font_02_sfnt_off0000fd94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD94 10748 bytes
SHA-256: 9aa1c9d5e102a2e7ae516882560615d87ef3f3839f5b30b3226775ba2795791c
font_03_sfnt_off00012199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12199 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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