Malicious PDF — malware analysis report

Static analysis result for SHA-256 399cb7c283f84792…

MALICIOUS

PDF

73.9 KB Created: 2021-04-15 19:29:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 88e0cf50b7905cb7598a12fcbfac06c1 SHA-1: 12bf432fd964558bde01156976dcebb89d3cedcc SHA-256: 399cb7c283f847927848f1c62781145a0cbcb3359cb918d21ff6175d734ad82f
214 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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+long+to+charge+an+ipod+nano+3rd+generation In PDF document text
    • https://zigamebujadosa.weebly.com/uploads/1/3/4/7/134745820/rejuruvatun.pdfIn PDF document text
    • https://nifiwaratobiwe.weebly.com/uploads/1/3/5/3/135346776/804560.pdfIn PDF document text
    • https://wujupeduluruwuv.weebly.com/uploads/1/3/5/3/135316277/divarobi-puvelel-basowikuri-kafibopitadika.pdfIn PDF document text
    • https://kibodoru.weebly.com/uploads/1/3/2/6/132695707/1647095.pdfIn PDF document text
    • http://fufumizajo.22web.org/marriage_certificate_form_mp.pdfIn PDF document text
    • https://vimititop.weebly.com/uploads/1/3/4/3/134339659/mupolefe.pdfIn PDF document text
    • http://tubipiguposazi.22web.org/mowagexu.pdfIn PDF document text
    • https://kexipana.weebly.com/uploads/1/3/2/7/132740250/d83d428450.pdfIn PDF document text
    • http://xugerovogubex.22web.org/doofy_reporting_for_duty_meme.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nekoraxevab.rf.gd/how_much_do_generac_whole_house_generators_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/89188246922.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/cape_town_convention_idera_form.pdfIn PDF document text
    • http://jusaloxu.epizy.com/64878129128.pdfIn PDF document text
    • http://butadiviwev.rf.gd/office_365_email_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/does_fairy_tales_kill_lice.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/free_excel_business_budget_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/dininukokakujatimogenotix.pdfIn PDF document text
    • http://tanofekomom.epizy.com/cd4081be_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/penofowamipejezafu.pdfIn PDF document text
    • http://vujipuxi.epizy.com/florida_used_car_bill_of_sale_form.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F8 5376 bytes
SHA-256: 428b3466e47c9d4c8abb6d99f87c1c3c8ed01de64562a1eca4c50a246e7e5543
font_01_sfnt_off0000f552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF552 10812 bytes
SHA-256: aed2c8e4ba75a50d24eb21c69eb715fa010d3d3eb4accddc2e32551a9bd742d5

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