Malicious PDF — malware analysis report

Static analysis result for SHA-256 761d53300e788794…

MALICIOUS

PDF

61.1 KB Created: 2020-11-18 12:36:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 32bab6c105d1f4ab6bae1973217a1178 SHA-1: ba5df622297647e7ecdc035af29ce929c6424bff SHA-256: 761d53300e788794253d2dd3e6127ee076081ee6514ef1a7eeecb4dc5909df01
212 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one heuristic specifically identifying it as a 'PDF SEO LINK FARM' and another flagging a link to known malicious redirector infrastructure. The ML classifier also indicated a high probability of maliciousness. While no scripts were extracted, the presence of numerous links suggests an attempt to lure users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6609

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
  • 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.
  • 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://ggtraff.ru/aws?utm_term=ocarina+of+time+theme+piano+sheet+music In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_5f8c989921da0.pdfIn PDF document text
    • https://kesevaze.weebly.com/uploads/1/3/1/3/131383297/fd5b6.pdfIn PDF document text
    • https://farupixin.weebly.com/uploads/1/3/4/3/134314126/lamaz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f872a97c6672.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5f9718df91d97.pdfIn PDF document text
    • https://walijogopabo.weebly.com/uploads/1/3/0/7/130776167/segifelesilokunuva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f87285242d73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_5f8e31cf761a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427282/normal_5fb00c1b22b2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_5fa250d16d03d.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c07eb22-0bed-4800-b0b5-7f6a51969efb/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c1076a2-b06b-45ac-b2de-0ebea6ed0f96/ezra_brooks_decanter_price_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38a49c01-4f5e-457c-bbca-cbba36bc3ff4/vavilatajiwopuxeta.pdfIn PDF document text

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