Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f295ea0cdcce92a…

MALICIOUS

PDF

69.4 KB Created: 2020-12-04 16:29:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4dd03b35d4444e87d80ddd1d506326e3 SHA-1: ee367e8f0b5f5f3ba46a5e5f42763c2bb970e104 SHA-256: 4f295ea0cdcce92a4f9357f1df1b3671f133503985ed571cb74b2ba7703e9093
164 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external links, including a link farm heuristic, and a 'download button' heuristic suggests a phishing or malware distribution scheme. The primary malicious URL identified is traffset.ru, which likely serves as a landing page or distribution point for further malicious content.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffset.ru/strik?utm_term=gb+whatsapp+apkpure+old+version PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384155/normal_5f9706f0296d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408174/normal_5f9424726605f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_5fa6b6290f097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456667/normal_5fb376f91c16a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451033/normal_5fbe083e8cd8d.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/4223030.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370529/normal_5f9db33c63abf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368954/normal_5f9d385cb3fae.pdfIn PDF document text
    • https://sokazavuse.weebly.com/uploads/1/3/1/3/131378988/xixovan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f8891dab3f41.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e0ff34-5c3f-46cd-b0bf-78ee9bd6090d/zepuwuvegumexutezudiri.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f769ec917750a3d83c85/t/5fc9638fab78533d4838f802/1607033743864/random_video_chat_app.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d4c78139af037644e8c4/t/5fc1a378bc819f1cf41655e7/1606525817488/vidal_sasoon_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc29fc08787e879897709a8/t/5fc7dab4a66cae07662ac464/1606933173674/penobe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f7235687f52b6b817f64/t/5fc3092f5147b14804972cdf/1606617392513/the_collected_works_of_mahatma_gandhi_100_volumes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0de9c5bcb0228a2825217/t/5fc17bb6e18c5c478e33da56/1606515639440/pokijulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e17368f-1783-4223-ba04-9887ce3a0ef9/agile_release_train_sync_meetings.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_off0000d25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25F 5432 bytes
SHA-256: 71df1d1e827ff50173389c552b43fea3c16c2a39c82caccac815ec20c95f725d
font_01_sfnt_off0000e4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E4 10364 bytes
SHA-256: 748fcd7f8d08995bd981750db60647e1040e7adecb2dc7d6f9a41a4577215ab1

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