Malicious PDF — malware analysis report

Static analysis result for SHA-256 8abe67a94ec3a6a7…

MALICIOUS

PDF

68.9 KB Created: 2020-11-22 11:50:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b8b3c4f5789c7e2f7a7483b975e9e8fe SHA-1: d2efdfdd42c19d9e394f80ddfa088880bb444821 SHA-256: 8abe67a94ec3a6a7ecb29519620eb249bab16f039d9ac7128f9fdb0fd727f39e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, many of which are likely part of a link farm designed to manipulate search engine results. One prominent URL, https://trafftec.ru/123?utm_term=golf+clash+hack+apk+2019, is presented as a lure for a "golf clash hack apk 2019". The presence of numerous external links and the deceptive content strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/123?utm_term=golf+clash+hack+apk+2019 PDF link annotation
    • https://pareropifu.weebly.com/uploads/1/3/4/3/134349273/05ae9aa2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426688/normal_5faaa6a785761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5f93bac2b3eda.pdfIn PDF document text
    • https://dabituge.weebly.com/uploads/1/3/4/3/134344098/1121de577f9a5e.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/c18bfae5-8311-459c-8742-2ea5ab2ff992/femiwaxozozi.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/sadufefep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21b97bf2-6bd2-4091-a2b8-de9c9247e859/watch_x_men_first_class_free_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/xagalewuvoxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b640743-1b47-4f6d-b4a7-b9b6a33e0947/4015419031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8d13ad9-3d29-49d7-b6ba-639fc3240428/81410029423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab18c77-e69c-4339-8b66-4b5131781c0a/3459938444.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/factors_affecting_demand_for_labour.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_off0000cef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF8 5584 bytes
SHA-256: b4c4ea03db2f4e0ba835d5473a61bf5ed15975d1d0f45f137a638954af8b2d96
font_01_sfnt_off0000e1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FD 10772 bytes
SHA-256: cb8cb1dc19bf82233b1c7f60de89803b36d6164ae5091d15af88fefc228b6283

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