Malicious PDF — malware analysis report

Static analysis result for SHA-256 58c1931d0d049b29…

MALICIOUS

PDF

69.7 KB Created: 2021-01-24 10:25:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 014b65b958184bef489b7b480af960c1 SHA-1: cdebddbda6ee75d852dbf3ac2b4bfd89f4308fe6 SHA-256: 58c1931d0d049b29fb601864dfd6239c57dfb5c93240be5abebf1f2e10a8617d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1105 Ingress Tool Transfer

The PDF contains numerous embedded URLs, with a significant number pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the overall structure point towards a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://leonvi.ru/123?utm_term=custom+arcade+cabinet PDF link annotation
    • https://site-1179300.mozfiles.com/files/1179300/my_octopus_teacher_netflix_trailer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387918/normal_5fc6ff379c7cc.pdfIn PDF document text
    • http://kujazudoxiro.22web.org/gipusomavadoxopu.pdfIn PDF document text
    • http://rajebamif.22web.org/devil_may_cry_5_strategy_guide.pdfIn PDF document text
    • https://site-1244992.mozfiles.com/files/1244992/get_your_guide_san_francisco_tripadvisor.pdfIn PDF document text
    • https://site-1168115.mozfiles.com/files/1168115/ctspak_result_2018_answer_key.pdfIn PDF document text
    • https://site-1168079.mozfiles.com/files/1168079/bluestone_patio_border.pdfIn PDF document text
    • https://site-1182802.mozfiles.com/files/1182802/arabic_to_tamil_dictionary_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nafabumawo.rf.gd/kemikexepulitavovunex.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/frostpunk_starting_guide.pdfIn PDF document text
    • http://moxododokojuke.epizy.com/facebook_for_iphone_5c.pdfIn PDF document text
    • http://doxekapop.rf.gd/retail_pharmacy_business_plan_sample.pdfIn PDF document text
    • http://tosopipates.epizy.com/occupational_health_and_safety_green_book.pdfIn PDF document text
    • http://dobupefibukin.epizy.com/xifapojazapajuzonu.pdfIn PDF document text
    • http://bixogonabu.epizy.com/pay_increase_offer_letter_template.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_off0000d246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD246 5100 bytes
SHA-256: f177a36e461f58c0d571a1d844060e417b88ff94c9356911976250f59061012e
font_01_sfnt_off0000e378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE378 11384 bytes
SHA-256: 497936c4815d3a290e49058550af5dc1f11fdebf66171cea47017a825f26e93f

Open this report in the interactive analyzer, or submit your own file for analysis.