Malicious PDF — malware analysis report

Static analysis result for SHA-256 522c446af1424138…

MALICIOUS

PDF

72.0 KB Created: 2021-02-21 02:55:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e2c2da731da81dbaeb97a2fe05c0851b SHA-1: 72e3805f17530ba953ea3d0b34f9f41046c3a08e SHA-256: 522c446af142413852be0a214680e02373bc316ad04b000da01f619c08018029
244 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to known malicious redirectors or disposable hosting. The document body, though heavily obfuscated, contains metadata related to a product name, suggesting a lure. The primary function appears to be directing users to malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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=canon+pixma+ip90+bluetooth+adapter In PDF document text
    • http://ch-redirect.icu/55174914998njfsv.pdfIn PDF document text
    • https://buzijivugaza.weebly.com/uploads/1/3/4/7/134709386/578bbb6f279a9.pdfIn PDF document text
    • https://guvixiwek.weebly.com/uploads/1/3/5/9/135976323/ropanopezizul.pdfIn PDF document text
    • https://cdn.sqhk.co/tegasipitif/GijjVjg/51507158043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449781/normal_602975fecd027.pdfIn PDF document text
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/gusibefiduten.pdfIn PDF document text
    • https://cdn.sqhk.co/gojelonub/fgVaiaF/mujuzanam.pdfIn PDF document text
    • https://pafetujesotizi.weebly.com/uploads/1/3/5/3/135348857/salavujif_pazuvagowu.pdfIn PDF document text
    • http://goromeo.club/python_classification_report_confusion_matrix5hg1v.pdfIn PDF document text
    • https://dudisavaw.weebly.com/uploads/1/3/1/3/131380109/laziv.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/fyPjMhi/giwudefokuv.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/fjjibQH/subibezuruwiki.pdfIn PDF document text
    • http://wifejopoxakobo.iblogger.org/free_bootstrap_templates_admin_2019.pdfIn PDF document text
    • http://boxoxele.22web.org/guzoduxexivosepanin.pdfIn PDF document text
    • https://teraxumafelenug.weebly.com/uploads/1/3/4/7/134747654/3587722.pdfIn PDF document text
    • https://gijagexerifaru.weebly.com/uploads/1/3/5/3/135322880/6fbc8d6cb2ff61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491688/normal_5fe5980637465.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nadalapaxizo.epizy.com/zepurebaditir.pdfIn PDF document text
    • http://xaxelajifamukas.rf.gd/blank_board_game_template_ks1.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB20 3216 bytes
SHA-256: e1f16f2f067bb961bf7714a6f4702311fe8fd11ca02194353183ad9edf632392
font_01_sfnt_off0000d6b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B3 5432 bytes
SHA-256: e77615e7971c6fed18dc03912839bb08f371433f76384e9339b50814f4ee6a95
font_02_sfnt_off0000e8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F1 12456 bytes
SHA-256: a7d15b60cefb58c9200c841c04afdf6f8c5dba459a56f4f9f5dd57bb15597713

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