Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2c2f2d34a3ec69e…

MALICIOUS

PDF

77.2 KB Created: 2021-03-29 14:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e293845a2018d1744b864d9200179f6c SHA-1: 65b3595e38f8bebfca8e8f957f142683d6fb06b2 SHA-256: e2c2f2d34a3ec69eca8e2863ca512381a6f06e33e30f9d30fc99dc7df5ff8ca3
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://botokaw.ru/wix?keyword=crusoe+had+it+easy+ending+guide', suggesting a phishing or redirection attempt. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, which might be part of a lure. No scripts were extracted, but the presence of external URIs and the high detection scores strongly suggest a phishing or malware distribution vector.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://botokaw.ru/wix?keyword=crusoe+had+it+easy+ending+guide
    • http://esclub.pro/17993049922b0vv9.pdf
    • https://cdn-cms.f-static.net/uploads/4410020/normal_6040b6cb42551.pdf
    • https://cdn-cms.f-static.net/uploads/4376600/normal_6058ae86a4771.pdf
    • https://cdn-cms.f-static.net/uploads/4418197/normal_6041cb76afeef.pdf
    • https://cdn-cms.f-static.net/uploads/4404739/normal_603a892361a02.pdf
    • https://cdn-cms.f-static.net/uploads/4446773/normal_601b7c64354a5.pdf
    • https://cdn-cms.f-static.net/uploads/4365580/normal_605053c6c0bb6.pdf
    • http://repair-telefonov.ru/mosoladajewulibilubo9abt.pdf
    • https://cdn-cms.f-static.net/uploads/4379355/normal_605a762931460.pdf
    • http://alcexpress3.xyz/the_secret_life_of_walter_mitty_book_vs_movien2lr3.pdf
    • https://cdn-cms.f-static.net/uploads/4473410/normal_6040b81ca02ff.pdf
    • https://cdn-cms.f-static.net/uploads/4467915/normal_6056ef3010df0.pdf
    • https://static.s123-cdn-static.com/uploads/4495037/normal_5ffa811c5d7eb.pdf
    • https://cdn-cms.f-static.net/uploads/4401971/normal_603c21eb0abae.pdf
    • https://static.s123-cdn-static.com/uploads/4368227/normal_5fcfe7b113104.pdf
    • https://static.s123-cdn-static.com/uploads/4471960/normal_600989ba1afed.pdf
    • https://cdn-cms.f-static.net/uploads/4485310/normal_6031908f14fce.pdf
    • https://cdn-cms.f-static.net/uploads/4370055/normal_6049ad06c1eed.pdf
    • https://cdn-cms.f-static.net/uploads/4488570/normal_60173252443c7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/23fee541-09e8-4715-94c3-ffdbbe8bbdcc/play_dd_5th_edition_online.pdf
    • https://uploads.strikinglycdn.com/files/07dc3710-7857-420c-aec5-05352fb48c1b/what_is_texture_in_fashion_design.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_off0000f27d.bin
de0188f2d04224e1d40cbc2d9628b66ecbed5f6969fa96438743d7a1c34944fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF27D 5064 bytes
font_01_sfnt_off000103b1.bin
babcaba0940dbae3fd779472096866b11a178a8a730e568489363f8409073939		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103B1 10492 bytes

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