Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5456b6865626b8e…

MALICIOUS

PDF

69.8 KB Created: 2021-01-18 17:27:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4ea871d187daee2a885415c5fa0d7b42 SHA-1: 7773df14776c150092cc86202d87d8e698f0b8d3 SHA-256: e5456b6865626b8e6dd66b30e1944d493e9c96f2ad3acd4c7711b955a494779f
222 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which point to redirector infrastructure and a link farm, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lead users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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
  • 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://traffine.ru/aws?utm_term=canvas+business+model+template+doc In PDF document text
    • https://static.s123-cdn-static.com/uploads/4385012/normal_5fed390291c9e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379385/normal_5ff5752af2778.pdfIn PDF document text
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/womolubas-kogotoriko.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/likanutavorolebonat.pdfIn PDF document text
    • https://cdn.sqhk.co/vunalogivefu/EhijeRm/hidden_agenda_movie_2017.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411498/normal_5fed9e1967774.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366028/normal_5fe19345eaf09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370740/normal_5ff55ed4a3cba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_5fe9e2422592a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369161/normal_5f8ece7e81442.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/2561762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389585/normal_5fdbb1fc57be8.pdfIn PDF document text
    • https://livadasim.weebly.com/uploads/1/3/4/3/134312527/biwomuzov_rinower_movisexu.pdfIn PDF document text
    • https://sazisibibufesu.weebly.com/uploads/1/3/4/3/134339611/b6e01fcaf2.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/gafedupeba/runescape_imp_catcher_quest_guide.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_off0000d5cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CC 5228 bytes
SHA-256: 759352ba38d8e2f032de44a9d116289073f197108397f1e93fda0023bd3523e3
font_01_sfnt_off0000e784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE784 10020 bytes
SHA-256: c882c2c57ca3de42e3715136c8bb7b7b7cba6134cba1ff41219b92c7cdee12f7

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