Malicious PDF — malware analysis report

Static analysis result for SHA-256 734544ba1e68c396…

MALICIOUS

PDF

74.7 KB Created: 2021-02-16 07:53:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1b661426dd77774fb0ac40399a7bf2aa SHA-1: 418b5adcee1c06de5f2fc8426e1f00bb66e5861b SHA-256: 734544ba1e68c3968b53b7f0d5c75f16dd5c4341da7d255b1a169fa36f285ab7
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support this assessment. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document's primary function is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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://crophysi.ru/strik?utm_term=how+to+use+a+mr.+clean+magic+eraser+mop In PDF document text
    • http://momezalomakejo.22web.org/bright_line_eating_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391623/normal_600e09c2e0687.pdfIn PDF document text
    • https://cdn.sqhk.co/mibajufaneja/jjPgfvY/towotawo.pdfIn PDF document text
    • http://makeyourself.xyz/waxilomep7ko.pdfIn PDF document text
    • https://cdn.sqhk.co/lenawemijixe/VFkHYki/xupalusadur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379217/normal_60053c45304c5.pdfIn PDF document text
    • https://cdn.sqhk.co/zojoguxuban/cn6tLfL/tifusogimen.pdfIn PDF document text
    • http://lidlid.xyz/biology_project_karyotyping_activity_answers2ca4q.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458833/normal_601a5be09d293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448995/normal_6016b31ae6c63.pdfIn PDF document text
    • https://cdn.sqhk.co/gakilofod/Viageif/zunetokidamu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://poziluxolebulu.epizy.com/you_ll_be_back_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/jixeredimane.pdfIn PDF document text
    • http://roparewuna.rf.gd/coreldraw_2019_full_crack_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/31839208404.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/difogazirilif.pdfIn PDF document text
    • http://bapibalapu.rf.gd/airserver_android_to_apple_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/novel_drug_delivery_system_review_article.pdfIn PDF document text
    • https://s3.amazonaws.com/mujevubutukoxu/sophos_central_endpoint_intercept_x_datasheet.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_off0000e843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE843 5340 bytes
SHA-256: e191d9e0d668314f900b0c1e051d032fae3168c41443f0b530c00043704f84e2
font_01_sfnt_off0000fa6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6D 10384 bytes
SHA-256: 87becd5474627883424aa8a4122a39c625c10ee3ff991c989e8c31b7d4788ad6

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