Malicious PDF — malware analysis report

Static analysis result for SHA-256 067a5dbb1e99e0a6…

MALICIOUS

PDF

60.2 KB Created: 2020-12-18 21:52:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 06a3b7d9701a10e9e7ffc4715974e775 SHA-1: 7d8f25eb0484bd37b1119aa0bfc55d7083f6fd13 SHA-256: 067a5dbb1e99e0a670564e1fc1edb9e55b07e77e285351fa69b2590630fab01a
164 Risk Score

Malware Insights

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

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, including one pointing to 'trafftec.ru', suggesting a link farm or phishing attempt. The presence of a 'download button' heuristic further supports a lure-based attack. While no scripts were extracted, the PDF structure and external links indicate a potential for downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafftec.ru/123?utm_term=buford+middle+school+lancaster+sc PDF link annotation
    • https://takewinedol.weebly.com/uploads/1/3/4/7/134768260/81812.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/wogiselaruto-nokage.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/kavugusepe/jazazutol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53bf58ab-eeea-4e2b-bafa-055963842fae/pewizup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2eeb0a1-f5f4-40a2-8365-8fb04a67fa62/78370062645.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/70665663144.pdfIn PDF document text
    • https://s3.amazonaws.com/bulalowisu/call_recorder_android_app_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b50af3-6af7-4cb9-ac50-47b30a443279/victoria_beckham_size_chart_target.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d0191e2-f8e6-47ef-acd5-cce31ac71a1a/babetoxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8abdd936-88c7-4884-9d42-436aecb40366/38578462413.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc052d83dfdd95b60d21819/t/5fd216ad5e090321caba6017/1607603886095/heavy_metal_greatest_hits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f7c3a6-bf40-449e-b37b-11853ba49d5b/pemewugizufumobodaji.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/capacitor_ceramic_224_datasheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d38e5687f52b6b8dad8d/t/5fc6a8b95147b148041eb8bb/1606854841320/school_of_dragons_codes_2020_october.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3636d5a1-7e3e-4a4a-bd4e-e675d204c385/89077229872.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_off0000aec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC9 5308 bytes
SHA-256: 1a180187266306fad83638378948e2117f6b5f1b95a22d80cb3864cc93b78ad7
font_01_sfnt_off0000c0ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AD 10400 bytes
SHA-256: 37a4771461ddea9189c5509adfc0a9374b3080d8273ef2a45541ca552f73ea53

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