Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b3f4074ee5446b6…

MALICIOUS

PDF

72.7 KB Created: 2021-03-15 14:32:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 162f28e4b5a260fabce2c25900b713ca SHA-1: 6060ae544c3b9e3ab5e90b5007e3a0303f47ae07 SHA-256: 3b3f4074ee5446b6de882880f8d934d8917b653c7246d5081613a9825a34fab8
312 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by multiple heuristics, including a critical finding for a link to known malicious redirector infrastructure and brand impersonation (Amazon) for credential phishing. The file also contains a link farm with numerous external PDF links, suggesting an attempt to distribute or redirect to further malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://namevixezevir.weebly.com/uploads/1/3/0/9/130969021/fegoxejigurugu.pdf.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=cset+multiple+subject+subtest+2+study+guide In PDF document text
    • https://cdn.sqhk.co/wudarivat/ihhcifp/nularidibolovolubuluxal.pdfIn PDF document text
    • https://namevixezevir.weebly.com/uploads/1/3/0/9/130969021/fegoxejigurugu.pdfIn PDF document text
    • https://dujekiwirole.weebly.com/uploads/1/3/4/2/134266498/ae094776ee.pdfIn PDF document text
    • https://gonuvogizup.weebly.com/uploads/1/3/1/8/131857562/2919450.pdfIn PDF document text
    • https://cdn.sqhk.co/jawefujivi/66dFgfV/hindustan_times_epaper_delhi.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
    • https://f1c0478e-57b3-422a-b8eb-433964b677d2.filesusr.com/ugd/16c17d_ea51848835964386a276edd227b7be69.pdf?index=trueIn PDF document text
    • https://be1d055c-b83b-422e-9e68-1bf13cef350c.filesusr.com/ugd/5b1e3c_9496ee36e5204ea181d197dbf61403f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/pegilepepisevabega.pdfIn PDF document text
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_c3ef5ace3cce46cd84d2f412214af541.pdf?index=trueIn PDF document text
    • http://feduneve.rf.gd/is_personal_taxes_included_in_gdp.pdfIn PDF document text
    • https://69f1164a-dcd3-4310-9fb4-3b67f03bdbb0.filesusr.com/ugd/9d7282_7d862690d027482a88423d104a79618a.pdf?index=trueIn PDF document text
    • http://kajusob.epizy.com/how_does_unloader_valve_work_on_pressure_washer.pdfIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_028805a0e9e149a28e82717fc0c978e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gazivemon/18650_battery_spec_sheet.pdfIn PDF document text
    • https://1f53f175-067f-4140-b001-f66bebc9855b.filesusr.com/ugd/c711d8_f97408adee154ae58cbb0baeb7065b30.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kelageketisefuv/51053095546.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD062 5228 bytes
SHA-256: 20567e50a0017542ad0a3ef6f9afcd06fa0f667e90028d91d14058c60bb33aad
font_01_sfnt_off0000e240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE240 11076 bytes
SHA-256: 8e11930612ffacf731b4b4db0d3772a1bb740b90985a8f4e7ee99d723e562d5e
font_02_sfnt_off0001078f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078F 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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