Malicious PDF — malware analysis report

Static analysis result for SHA-256 57550fb64b9e3757…

MALICIOUS

PDF

73.0 KB Created: 2021-03-13 17:27:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6067f064f72d7827a705c73461c2026a SHA-1: 29d7b223a21ddb8d566faa35fcf3e9c598562efa SHA-256: 57550fb64b9e375715c8d919b0e6a9de4cc7e7c18c27333ae7ae7b7c89454cb0
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 'dafemum.ru'. This URL is likely used to redirect users to a phishing or malware-hosting site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL within the document structure indicates an attempt to compromise the user.

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://dafemum.ru/strik?utm_term=msi+760gm-p34%2528fx%2529+price+in+bangladesh In PDF document text
    • https://cdn.sqhk.co/dewavasese/6jKja5c/lowe_s_phone_number_in_monroe.pdfIn PDF document text
    • https://cdn.sqhk.co/dakuwuwuzije/ZCgeaid/grocery_shopping_list_healthy_budget.pdfIn PDF document text
    • http://zerkalo-fugicar.website/tecnologa_de_las_centrales_termoelctricas_convencionalesawh6q.pdfIn PDF document text
    • https://cdn.sqhk.co/tamupoto/ijjifli/all_creatures_great_and_small_veterinary.pdfIn PDF document text
    • https://cdn.sqhk.co/tefegegesuxe/clnBeFr/43274287790.pdfIn PDF document text
    • http://vandify.com/nisuv0claa.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/jodabiladezot/14712599695.pdfIn PDF document text
    • https://s3.amazonaws.com/faluzotixupi/rikike.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/ziduziza.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/internet_manager_serial_number_6._23.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/fatimiradopaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/occurrence_of_metals.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/carcinomatosis_peritoneal_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/77554759894.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/bt_cordless_phones_with_answer_machine_argos.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/befofofafara.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/acrobat_reader_professional_6._0_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/waiters_full_form.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_off0000dd2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2C 6596 bytes
SHA-256: d00078b191d894c70121f79dd1a0eb31b2851a9e5fe1d61a212459442acf3e46
font_01_sfnt_off0000f39d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39D 10440 bytes
SHA-256: 44bf692e124ab72095ce9dffe401548ea2fb67925cc6c01feac5566df60a15e9

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