Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ec47ef73802cb3…

MALICIOUS

PDF

67.9 KB Created: 2020-11-14 08:32:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c1fad67d69ec82e4e28ea15230187a7a SHA-1: 7e781f527ff59edc76b12f9cb42ca21c49ab4d25 SHA-256: 24ec47ef73802cb32dabdec8cf93a3d6a8c3e33b20c9d6ee600d1f6b06f4e05d
214 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ggtraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, one of which is 's3.amazonaws.com/fasanag/betheme_tutorial.pdf'. The ML classifier also strongly flagged this PDF as malicious. These indicators suggest the document's primary purpose is to lure users to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=xcom+2+snake+waifu In PDF document text
    • https://xerirexu.weebly.com/uploads/1/3/4/5/134592073/9d06d7c56c73d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389616/normal_5f8f28a827005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409000/normal_5f92be4d4f92a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374368/normal_5f95b0d36ce7e.pdfIn PDF document text
    • https://kukezuleji.weebly.com/uploads/1/3/4/3/134361302/2151799.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379722/normal_5f9066a141056.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401546/normal_5fa5ea7ee2c55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382408/normal_5f91200dcd0e4.pdfIn PDF document text
    • https://jinerepesejo.weebly.com/uploads/1/3/4/5/134576949/4192522.pdfIn PDF document text
    • https://vazipetola.weebly.com/uploads/1/3/4/4/134493341/zanubetodajixomomus.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/c53b361c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426075/normal_5f9d54deda984.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/fasanag/betheme_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/change_to_word_file_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/60270653786.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/list_of_words_and_their_meanings.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_off0000cbf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF0 5164 bytes
SHA-256: d16709faca0e2bee43087fa03779dcc0f3284a2f3e697e1a85b4321f56c922ab
font_01_sfnt_off0000dd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8E 10916 bytes
SHA-256: c654205696a0a2f30401b608fd25575d3b790905e1853ca3ae0862286bcfb0ca

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