Malicious PDF — malware analysis report

Static analysis result for SHA-256 061b4ebe44b898cf…

MALICIOUS

PDF

74.1 KB Created: 2021-01-06 07:06:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: ec256d2ec43f47896eb0f9a0e4f59af5 SHA-1: 955864caf61bd2bd2f7a5d0b3326fe71a1f43ae4 SHA-256: 061b4ebe44b898cf2d2821e26f3dc7f95b127ef65225c1c41af489f98c8f71a4
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically 'traffine.ru'. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'Presentation secrets of steve jobs ppt', likely to entice clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://traffine.ru/123?utm_term=presentation+secrets+of+steve+jobs+ppt In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383300/normal_5fbd0089e19ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482848/normal_5fa9ec10c4238.pdfIn PDF document text
    • https://faxipanonuk.weebly.com/uploads/1/3/4/3/134352952/sawudilovafemi.pdfIn PDF document text
    • https://cdn.sqhk.co/vuritukupus/oAiahee/36760123012.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414175/normal_5fc466b6e8b51.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/d1672311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388619/normal_5f97d91f262a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374021/normal_5f92e207d47ee.pdfIn PDF document text
    • https://jaketomerinojox.weebly.com/uploads/1/3/4/1/134109184/lepixapazarowurabip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/mesajut.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/run_3_unblocked_games_online.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/aatish_full_movie_khatrimaza.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_off0000e445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE445 5252 bytes
SHA-256: a2b94edd4de31a4f90ba03375b39dc3fcdc5f3dcc21a52d349369ae4f5332fd4
font_01_sfnt_off0000f641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF641 10364 bytes
SHA-256: 12383d167520bd8e7a172d9edd343c5e0b60d1cf0eec3bbbbddc6b32b613ff7a

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