Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e743a015f7338e…

MALICIOUS

PDF

69.8 KB Created: 2021-03-13 20:27:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9ca7327e11fd38ba407a61a9537578d2 SHA-1: 13d7591e9574c606aa856528c4213024d43da01e SHA-256: a8e743a015f7338e8fdeb4253602b45cfb54e0ee8a0822f7f4025f61177c96e1
166 Risk Score

Malware Insights

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

The PDF contains a lure for 'Free office 2016 with crack' and includes an external URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The document body, though heavily obfuscated, suggests a software piracy lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/123?utm_term=free++office+2016+with+crack PDF link annotation
    • http://zofoxexizoviro.iblogger.org/wosuzedapaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412413/normal_603249c3c6d82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371814/normal_5fcd9f0bb20ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372373/normal_5fff92b5859d9.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/42329347266.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/the_lowest_animal_by_mark_twain_sparknotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403960/normal_602ec57027dd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376858/normal_5fe10972bcf58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365542/normal_5fc6de8420b6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483336/normal_5fdc5417d9cc5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494893/normal_5ffc663c96ce8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465556/normal_600cdfffd9c2b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_2b405286822d421e86aef953ab0323bd.pdf?index=trueIn PDF document text
    • https://b81e1767-bb0d-4562-9f98-cfef66859bb1.filesusr.com/ugd/b48b60_ba1156b638284704b20c9fde59e2463c.pdf?index=trueIn PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_34d2f69b8d3b439eb4af7036782b931b.pdf?index=trueIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_027fe1fd100b4c7caa7fa223af1d7bbd.pdf?index=trueIn PDF document text
    • http://lavovexerok.epizy.com/shakespeare_sonnet_106_interpretation.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_off0000d349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD349 5348 bytes
SHA-256: 7ae072660a691fa850617480f36577d52dcfcab04da0e45dfa2ed1f80484585c
font_01_sfnt_off0000e598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE598 10684 bytes
SHA-256: 63ca22f7c126286fa88f9e1066bc0e8f1f198e69c9f320fe21f43ac16afe0d24

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