Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa096b71386cdb40…

MALICIOUS

PDF

76.0 KB Created: 2021-01-02 10:45:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f413cb85ee4bb7cf0c2b6e2a5b87ea65 SHA-1: 40f2d465096faf94c917bfc9fe7b38c3085ad3f4 SHA-256: fa096b71386cdb40597a77a58a18f38caabeb2017e0ec4e941cd9db632bedd2e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, ggraff.ru, which is disguised as a search result for 'pokemon go plus watch app'. This indicates a phishing attempt to lure users to malicious infrastructure. The ML classifier and ClamAV detection strongly support the malicious nature of this PDF.

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://ggtraff.ru/wb?keyword=pokemon%20go%20plus%20watch%20app In PDF document text
    • https://cdn-cms.f-static.net/uploads/4412762/normal_5fa01dfdebaf6.pdfIn PDF document text
    • https://cdn.sqhk.co/nosuterib/qhivhg1/21094348439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376371/normal_5f9084d7f35be.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxozowaki/apcbiiw/art_sculptures_for_sale_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/puwukuwos/fggghYY/metta_world_peace_jersey_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezima/hjje2gd/dominoes_draw_game_rules.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/pulavokaxe/bootstrap_form_button_width.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/3524803001.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/seamfil_color_matching_guide_wilsonart.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/88410822798.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/sample_appointment_letter_format_for_teachers.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_off0000e127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE127 5244 bytes
SHA-256: 301fbada1cb8c5a07b3a56536894bbd943cfa6328a49c49b0cb3e3207b044c79
font_01_sfnt_off0000f2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2ED 10144 bytes
SHA-256: a5dc300a1d7373dd20f3f91927891033551d93e70fca1ea3f56e4de08f01f113
font_02_sfnt_off000115b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B1 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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