Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbcee2177611beb1…

MALICIOUS

PDF

157.1 KB Created: 2021-02-18 05:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 91d6b51fbcb6313f3863e810cfb8066e SHA-1: fe71f8f3b8c6c71c4a5ab27747f5bf6de76f5fad SHA-256: bbcee2177611beb1df35442d8ce58811f4124ced2961c4c68b456132f7805332
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. The presence of an external URI pointing to 'baarspo.ru' suggests an attempt to redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and the nature of the URL indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://baarspo.ru/wix?keyword=comparative+skeletal+anatomy+worksheet PDF link annotation
    • https://cdn.sqhk.co/livixugakuf/Ggcjgjb/age_of_world_wars_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/kaxejelun/3xhfJgj/ultimate_soccer_league_2016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460263/normal_5fe0c1f970b4f.pdfIn PDF document text
    • https://vizefibamoraxob.weebly.com/uploads/1/3/4/6/134613498/b4311153c3d540d.pdfIn PDF document text
    • https://cdn.sqhk.co/budajawisore/5nhcwid/poluz.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/cm0wxig/zudumuwiruzalo.pdfIn PDF document text
    • https://cdn.sqhk.co/riwifesineji/hhwAie0/5380803256.pdfIn PDF document text
    • https://cdn.sqhk.co/nikazurokuv/jdjb6kk/rotolibapen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384640/normal_5ffa8435463e4.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/uS3jhii/xivipakisenadevobilid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422163/normal_5fce3479afc4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451231/normal_5fd29890c38fb.pdfIn PDF document text
    • https://tezadogiva.weebly.com/uploads/1/3/4/5/134522012/f7cd9eb.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenixa/ajaySgj/24717689588.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fopagozijudiri.epizy.com/76162131484.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_off00022298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22298 5284 bytes
SHA-256: a5d73e058a276709b7a656409663d43d07fb8bc4845e55c1f786628686b53d2c
font_01_sfnt_off00023471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23471 1716 bytes
SHA-256: b744d20329a21ba1921c870a4deaacb4064f710d75eb1a58e31c0067c31195cd
font_02_sfnt_off00023d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23D17 12428 bytes
SHA-256: d07722ec8fea874be79c7f406149ec167303325fa589c5be7bc494a5ec6fb3fb

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