Malicious PDF — malware analysis report

Static analysis result for SHA-256 58fa1df952c3fefd…

MALICIOUS

PDF

60.7 KB Created: 2020-11-20 00:25:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 7d7120469684c683ab335f0e07aaee98 SHA-1: e81fc4ee233e01b925d63f19d64529bddba903a0 SHA-256: 58fa1df952c3fefde939235df31709cbff17fd3883181aaa5479c2c32b385b8b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to 'trafficel.ru'. Heuristics indicate a PDF link farm and ClamAV detection as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://trafficel.ru/123?utm_term=cubefield+swf+unblocked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370278/normal_5f8915215d006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423428/normal_5fb290ddbc951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372737/normal_5f8c05d27e1e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368767/normal_5fb33cbff3776.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/e32c7cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459320/normal_5fb2966aad349.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/sefiwegegagu/1641638965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b07ba32-10b9-4b91-94bc-3055b3530345/73661761043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b98e879f-d0b1-41ab-9b12-dc60bb630d14/dd_3.5_players_handbook_2_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69449ae1-2ba6-41c8-ae25-7b4d60c393b0/rudufigavopoxaxadoxamog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/533919a9-9f93-4d3d-822d-2cf5b8c0ebfb/jetavevolukimevopaf.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_off0000b142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB142 4908 bytes
SHA-256: 5b1d7e1d3aac7c4f43fac92356f03eda0bea2c6c5ae8f6eab08ead25a1c2b55a
font_01_sfnt_off0000c21f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC21F 10484 bytes
SHA-256: 692fce74220e311223a32480d8ac97840c7ab955e2cf3e310bc1ab5af012226e

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