Malicious PDF — malware analysis report

Static analysis result for SHA-256 412fb8ddf291bf91…

MALICIOUS

PDF

73.7 KB Created: 2020-12-31 19:08:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cc9d6514f2d7e65bd98d3f711cd867ba SHA-1: ee40c2a5d5816fe635b0c78441474468fab39977 SHA-256: 412fb8ddf291bf919ebcb15b634dcf890ff6126a113a478d45e8dd87eb9b752c
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 critical heuristic firing for a malicious redirector link pointing to 'https://ggtraff.ru/strik?utm_term=dop+draw+one+part+level+17'. This URL is the primary indicator of malicious intent, suggesting the document is designed to lure users to a compromised or malicious site. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=dop+draw+one+part+level+17 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4444357/normal_5feda14589e27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479679/normal_5faac6c8683bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f86f4053534e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450249/normal_5fa7de6174c3a.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/wusigipufuvowix/mastering_chemistry_answer_key_chapter_1.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/68270448402.pdfIn PDF document text
    • https://s3.amazonaws.com/tiniruru/donefoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab679425-bed7-48e5-ae6c-535a51bcff8c/8923638687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3383003-379a-4b6f-b940-239b5a2069ae/58569264336.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/birthday_party_song_dj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74180759-2209-41e4-b02e-509a53a13493/95822059369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b19faca7-52af-4cdd-acd2-d4aee076c997/jesus_and_the_fig_tree_kjv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a2bbd4-ef85-4f7b-98d9-1291e2ef7a9e/nsu_quickly_engine.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/54423110347.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_off0000daa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA4 5056 bytes
SHA-256: 64581e8f9bd971ecb715404d85f0bf821ca31a3c736a93639d9a599f70701fc0
font_01_sfnt_off0000ec06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC06 2232 bytes
SHA-256: 6bbe5adaea6a5f128f3f179c83b8a8e2e6f64ca2fc5798ed1c640b05aee0660b
font_02_sfnt_off0000f614.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF614 10352 bytes
SHA-256: 764cfc3ec0a61254c0baec32e21a69151840d18840fea786316b0becb38af457

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