Malicious PDF — malware analysis report

Static analysis result for SHA-256 6807d7dfb2ff5e56…

MALICIOUS

PDF

71.5 KB Created: 2021-04-01 12:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0d8e7815904a0d890fc9f7fa7723c24 SHA-1: 752c2222714fd44322cdfabf146aa48cffe953c8 SHA-256: 6807d7dfb2ff5e5678d49c95378d3b249ad454ceb7d0df23a364402004a8340f
96 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an embedded external URI, specifically 'https://botokaw.ru/award?keyword=classroom+management+examples+pdf', suggests a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with common techniques for delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=classroom+management+examples+pdf
    • https://static.s123-cdn-static.com/uploads/4465269/normal_5fc8528da849e.pdf
    • https://cdn-cms.f-static.net/uploads/4501229/normal_60124071e728e.pdf
    • https://cdn-cms.f-static.net/uploads/4485704/normal_6039a5195ba89.pdf
    • http://gaxazoxisis.22web.org/537839462.pdf
    • https://cdn-cms.f-static.net/uploads/4411923/normal_60463949ed5c7.pdf
    • http://gawetuzunugigos.iblogger.org/sigivonisaliravejisur.pdf
    • https://cdn-cms.f-static.net/uploads/4369659/normal_6039e48a45fac.pdf
    • https://cdn-cms.f-static.net/uploads/4383449/normal_6060c3c299e94.pdf
    • https://static.s123-cdn-static.com/uploads/4417519/normal_5ff55c8b35a94.pdf
    • https://static.s123-cdn-static.com/uploads/4387411/normal_5fed01c34a518.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://de26864d-dd79-4a6d-8467-b5cf435a6969.filesusr.com/ugd/6ff07c_73ade6b92ccd4186b46a9386867cdc7c.pdf?index=true
    • http://ronodinagidos.rf.gd/distributive_property_and_combining_like_terms_worksheets.pdf
    • http://livexixabev.epizy.com/35647710987.pdf
    • https://uploads.strikinglycdn.com/files/605b871f-beea-49a3-ac6c-58e93e9f3314/joseph_prince_church_texas.pdf
    • https://d74058ad-8c31-4576-aeb4-582a73b10e1e.filesusr.com/ugd/666c83_a43445d51d2a43b6a549a3f9a7a6711c.pdf?index=true
    • https://uploads.strikinglycdn.com/files/91adec46-f2d1-43c2-abee-e7db8e607205/milaxobubel.pdf
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_0769ab6f87a8469baa174cf38388fc10.pdf?index=true
    • https://da54c32a-99c7-4590-8520-800dd2d1cae3.filesusr.com/ugd/7973d2_57f176f27c604f98a8c4385b8587bd28.pdf?index=true
    • https://uploads.strikinglycdn.com/files/17aeb859-31ae-40bf-aa27-0004528f77d2/qu_se_siente_cuando_se_sube_la_presin.pdf
    • https://02408c19-b9f6-4996-a596-1d5b7e46c8d3.filesusr.com/ugd/c83fdb_1d9d50a450944fb688d1205299a39def.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b3757062-204a-4cd7-9bde-b04613cf8ce7/32030979947.pdf
    • https://466f9527-ada3-48b4-ac0c-4ba5546996ca.filesusr.com/ugd/a4b6b9_19419443ba154ce599bdc1e266b6450d.pdf?index=true
    • 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_off0000da4b.bin
e640123b1f7ba59872dc632ed5b9445d6d9d604bb1f51dec475c029b4277df98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4B 5332 bytes
font_01_sfnt_off0000ec59.bin
2318572d7f147e67cca21f3c2bffe85fa4800f77fc0df38a2d67ad30ecd2b7ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC59 10868 bytes

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