Malicious PDF — malware analysis report

Static analysis result for SHA-256 64bcb5e5eb73578d…

MALICIOUS

PDF

80.5 KB Created: 2021-03-05 11:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e8dbdbbc59510b9f337caf4993a5821a SHA-1: a11ac4e8e125f0c75eb9e92381c35d1b2c9e47ec SHA-256: 64bcb5e5eb73578d8f119e54e706f98c7e92be00f2570f23b0036b26f389d957
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a phishing or redirection attempt. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' specifically flags a URL leading to known malicious infrastructure. The ML classifier and ClamAV detection strongly support the malicious nature of this document, likely serving as a lure for further malicious activity.

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
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/strik?utm_term=how+to+watch+youtube+on+kindle+paperwhite In PDF document text
    • http://fegokodelaxen.scienceontheweb.net/47245135916.pdfIn PDF document text
    • http://sesalon.xyz/8292155877bniwl.pdfIn PDF document text
    • http://chempion.coffee/jixezapilujiwebipokabaykaun.pdfIn PDF document text
    • https://nogiwesetegi.weebly.com/uploads/1/3/1/6/131637024/galapo.pdfIn PDF document text
    • http://keto-menu.online/67118663995mixah.pdfIn PDF document text
    • http://waxedeb.getenjoyment.net/zmodo_nvr_wireless.pdfIn PDF document text
    • http://koponegigat.medianewsonline.com/51687913379.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/kohler_command_pro_27_parts_diagram.pdfIn PDF document text
    • https://xedafiwiwez.weebly.com/uploads/1/3/2/3/132302754/6b8a4e.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/iUeijji/sling_tv_free_trial_roku.pdfIn PDF document text
    • https://pujelewi.weebly.com/uploads/1/3/4/0/134017294/zazep.pdfIn PDF document text
    • https://cdn.sqhk.co/guzikiku/chggdjd/81875437548.pdfIn PDF document text
    • https://gijajagilaz.weebly.com/uploads/1/3/5/3/135313732/9124633.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/BCicGge/fifa_soccer_13_wii_u.pdfIn PDF document text
    • http://it50disconto.info/lamborghini_song_video_pagalworldwalcq.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/jolunenafobuw/guided_tissue_regeneration_indications.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/dipoleguvadumilamapov.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DE 5340 bytes
SHA-256: 04ead00de86c4b7a6c0b3ae63514830fdf97936d81a3d34d3be48c451efa62b7
font_01_sfnt_off0000fb13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 10520 bytes
SHA-256: c1747fcab1ff51287ee2d129b41b1762978083386ee925a6b630820bcaf722db
font_02_sfnt_off00011f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F25 16088 bytes
SHA-256: fff8b70d67420864e2a263fdbbaad35efae781e73a516d3cf38207748e8715b5

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