Malicious PDF — malware analysis report

Static analysis result for SHA-256 460666ae414d59a9…

MALICIOUS

PDF

127.4 KB Created: 2021-03-18 04:05:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: dcee40f418459aec0a2e1c8db0e183dd SHA-1: a302e5d9b923696fd57a454624c443ddbfc962d3 SHA-256: 460666ae414d59a92f75ce5aa4a51f73c2700cd0634c22b838c5de758cd4c320
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of external links, suggesting it functions as a link farm, potentially for SEO manipulation or to host phishing content. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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.
  • 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://golowaki.ru/strik?utm_term=nato+alphabet+m PDF link annotation
    • https://pagafika.weebly.com/uploads/1/3/5/3/135339488/rozewiso.pdfIn PDF document text
    • https://daxexamuve.weebly.com/uploads/1/3/4/4/134446800/6039728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374211/normal_60315e02c9bdf.pdfIn PDF document text
    • http://zdsshop.top/star_trek_fleet_command_app_guideeo6zm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481663/normal_5fd662bb01826.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416322/normal_5fc7eed37bf64.pdfIn PDF document text
    • http://mysteps.online/how_to_scan_a_document_with_hp_officejet_4500dgdl3.pdfIn PDF document text
    • http://55571.ru/dovetenositafifunefoaixpr.pdfIn PDF document text
    • https://tulalesin.weebly.com/uploads/1/3/4/8/134876190/223072.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419236/normal_5fe4efce8c43f.pdfIn PDF document text
    • https://lixezakokigek.weebly.com/uploads/1/3/4/5/134596317/0ca8ca.pdfIn PDF document text
    • https://lozuninusagutog.weebly.com/uploads/1/3/5/3/135309735/5358796.pdfIn PDF document text
    • http://menformula.xyz/sat_subject_test_score_rangeqjsyu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379374/normal_602c10091fd2b.pdfIn PDF document text
    • http://reduslimitaly-official.site/gender_ideas_interactions_institutions_free_download2wx8w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kutijujivasoda.rf.gd/sasujozokugotonidenag.pdfIn PDF document text
    • http://kusilip.epizy.com/14598206976.pdfIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_8bdc1330052a4d8aa12a632dc67f7a22.pdf?index=trueIn PDF document text
    • https://c24d0846-efa5-4754-a822-a7dc8f88f2d4.filesusr.com/ugd/7b2abd_5dbbbe3b6e444ac8a1d52ef2621a4b35.pdf?index=trueIn PDF document text
    • https://cf075d60-af7c-4c71-a16c-5c8c125a9bb7.filesusr.com/ugd/cc03df_98a796f07b2a48ff9e0ca95aa617b392.pdf?index=trueIn PDF document text
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_eadbf60c13494642b91dc264584b73ca.pdf?index=trueIn PDF document text
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_3e2b2083209145a1890b428c24b97e57.pdf?index=trueIn PDF document text
    • http://tiriburud.rf.gd/zigeva.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C7B 4528 bytes
SHA-256: b47e0090383b20fe0b840bb69574929bfc262e3a8a3658b2bfad0bd490a633fa
font_01_sfnt_off00019bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BDF 15928 bytes
SHA-256: 19f951b25df0e6cdcf1b8a8a1784492148509ab9f735f7e18515cfe59e283492
font_02_sfnt_off0001cc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC74 16116 bytes
SHA-256: 6fffb1aeb89666cbcaec4ce24454e19e9ad5757041bd2745d7057949fb60916b
font_03_sfnt_off0001e150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E150 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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