Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b59b4152893f7ff…

MALICIOUS

PDF

65.3 KB Created: 2021-03-29 03:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 43afbc45ab1a27a78e7e4d6f1378f313 SHA-1: a496f3ca4d13e0c89016b287c4b5d4356f9ddf61 SHA-256: 2b59b4152893f7ff0175b1fcd913cc5c004c10a3341353cbe1df1932cf5383e8
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 0.9998

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
  • 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/wix?keyword=hollis+primary+school+staff In PDF document text
    • http://tiktokcopyrighthelpteam.com/21801034583s8pzu.pdfIn PDF document text
    • https://jidupedepinamup.weebly.com/uploads/1/3/2/6/132680921/c4725efd68f.pdfIn PDF document text
    • https://namebobave.weebly.com/uploads/1/3/0/7/130739452/zusote.pdfIn PDF document text
    • https://wugabatove.weebly.com/uploads/1/3/5/3/135318753/xukakisomenod.pdfIn PDF document text
    • https://malomunadososep.weebly.com/uploads/1/3/5/3/135351096/6578602.pdfIn PDF document text
    • http://magnifioco.site/iomega_home_media_network_hard_drive_cloud_edition_manualkic3a.pdfIn PDF document text
    • http://remont-pc.website/dd_ranger_spells_level_195ij0.pdfIn PDF document text
    • http://shopsupergood.site/does_samsung_have_disney_plus_app5zwwe.pdfIn PDF document text
    • http://edaruzal.xyz/july_2020_calendar_template_wordhtizp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/vikuw.pdfIn PDF document text
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_b1a8893faf16441c80800c51777e8087.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/minabiwa/58649688895.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/14349787260.pdfIn PDF document text
    • https://29aa9d28-cc9d-45fc-8d86-3718b5881c84.filesusr.com/ugd/74c34a_c6aad4a937144d788e36df4b6a3dd973.pdf?index=trueIn PDF document text
    • https://9f53eded-325d-4e02-8430-7c09bd872488.filesusr.com/ugd/e04405_a39df22ea1d24dc1b80d4589384e3758.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/taldorei_campaign_guide_review.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_off0000c266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC266 5320 bytes
SHA-256: 41d94b6a638e476ed39f76a2d688fa9c87314538a96c3bd3277c07210134d8bb
font_01_sfnt_off0000d457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD457 10496 bytes
SHA-256: e14132305db5640bb60bbdba98ab99dcac45c98e0a0471ac0e1e5bd65ddc5c1e

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