Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd9842764a71b89…

MALICIOUS

PDF

70.6 KB Created: 2020-12-19 03:53:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b2529a6d885d8a3a4c3fb7c92bfcfa58 SHA-1: 92fb356a8e5a8192dacedf5aff2c1115e44f0e7a SHA-256: 4fd9842764a71b893158229d3347223f16d3086d64354c9a26b2173786815743
214 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically a URL associated with a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to business ideas, suggesting a lure.

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://traffine.ru/wb?keyword=small%20business%20ideas%20from%20home%20in%20usa In PDF document text
    • https://static.s123-cdn-static.com/uploads/4418755/normal_5fcde01f6d6ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366358/normal_5fc8f30a206f6.pdfIn PDF document text
    • https://bafixexewav.weebly.com/uploads/1/3/4/3/134352321/katapumanomevafopugu.pdfIn PDF document text
    • https://taxajadotediru.weebly.com/uploads/1/3/0/8/130873824/fbe89b91f34ff.pdfIn PDF document text
    • https://gifenatewa.weebly.com/uploads/1/3/4/4/134480542/jisatezuput-tunezuridugo-wejedisejuzebij.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://uploads.strikinglycdn.com/files/2c0e670e-90ea-4c52-98fc-360fb4ce9853/jifegirix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f15dff1c-9143-40c8-9472-ecacc2863bb4/82263020561.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/84710432459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/305a5c1d-d3d3-47ce-a766-3d3843c5bbfd/mogojonivipilofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a32919-f263-4131-b2fc-f90c228c86b6/kwikset_manual_smartcode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e07d017-d271-4f3f-9ac9-c6d411ebfabb/mr_jones_animal_farm_traits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a163168c-bbe8-4464-947e-516ac044a52e/cheat_engine_6.3_for_chrome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45fe885b-9fa8-43a1-b372-fd13cdae2887/become_beer_girl.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/torrent_game_of_thrones_s8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/515aaae6-ff5a-403e-8fc4-ea6efa23021c/lead_scrap_price_per_pound.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_off0000c983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC983 5192 bytes
SHA-256: 92aaaf8554fa56b62bf1265dbea911a8eee37a50022e38f1c051be845e020b04
font_01_sfnt_off0000dae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE1 10696 bytes
SHA-256: c56091cf4a9bcea89105d1d624ee404734fceadfa6032fbca2057d2c09e5baf9
font_02_sfnt_off0000ff54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF54 4324 bytes
SHA-256: ad623bc7c681097dfa1224999cf6cc6072d3ca9a137655dc1129b0261f0b357c

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