Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd0c8c0acb689f6…

MALICIOUS

PDF

69.0 KB Created: 2020-12-21 19:15:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d3b1e7730b8c3c4fa4b118fa41c7e734 SHA-1: eabb6afe9f0986e4b908c758bffd5be46f54eec7 SHA-256: 3dd0c8c0acb689f6d40a1cd4b7f55be6e94caa9bf075105f0717edcd1706118c
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a mod apk download, suggesting a phishing or scam lure. The presence of numerous external links, including a link farm, further indicates malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/strik?utm_term=slice+e+dice+mod+apk+unlimited+money
    • https://bezoduremudopez.weebly.com/uploads/1/3/1/4/131437412/3875738.pdf
    • https://sibitolifi.weebly.com/uploads/1/3/4/7/134732274/kiximapiki.pdf
    • https://static.s123-cdn-static.com/uploads/4410954/normal_5fe0523500eb8.pdf
    • https://fufukarebalomok.weebly.com/uploads/1/3/4/3/134352968/4938287.pdf
    • https://bukodebavuv.weebly.com/uploads/1/3/4/6/134657655/kazomagi.pdf
    • https://cdn-cms.f-static.net/uploads/4494431/normal_5fb8188571086.pdf
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/wumolasudeligen_jarija.pdf
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/335198.pdf
    • https://sozawozoxo.weebly.com/uploads/1/3/4/5/134509422/banokimasov.pdf
    • https://taburexil.weebly.com/uploads/1/3/4/3/134374137/luzutozures-temufibun-lilexinipun-lezunovanajo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc51675e2fce462bca6e6c5/t/5fc9edd4acaba31734622480/1607069140701/house_party_2_pajama_jammy_jam.pdf
    • https://static1.squarespace.com/static/5fc5070d2e537a05ef2387ad/t/5fc5c5569d79364840558406/1606796634067/problem_solution_graphic_organizer_5th_grade.pdf
    • https://static1.squarespace.com/static/5fdd52f507af9e0e16f5551b/t/5fddc95b8afbbc27174e5dbb/1608370523610/abcd_telugu_movie_video_songs_2019.pdf
    • https://static1.squarespace.com/static/5fdcb8151ac7e22a65153ef0/t/5fdcda7ac8355508984cdbc7/1608309371376/razer_chroma_keyboard.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a2.bin
7ea62f8e5f6766f355c50f414813a0874314e17bb861a50201a10d91dbe239ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A2 5216 bytes
font_01_sfnt_off0000e260.bin
3fdf90a0542cca3a8d4798968b477d85765079461e6bb7e308725e626cacd312		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE260 10848 bytes

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