Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b9132a4cc86748…

MALICIOUS

PDF

79.0 KB Created: 2021-03-13 19:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 626df4af8688ee359723b17a0b7a1779 SHA-1: 02b1e03f5fc7d806d714040affc552c63538e8a3 SHA-256: 57b9132a4cc867483b544434af7594fe9f0aa9f9020ee4ac00a4f8274b1e1ccd
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary URL, https://xezojetit.ru/wix?keyword=mercury+outboard+manual+download, indicates a lure for users searching for specific manuals, likely to redirect them to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=mercury+outboard+manual+download PDF link annotation
    • https://nububoreral.weebly.com/uploads/1/3/4/4/134467099/2055605.pdfIn PDF document text
    • https://mafogidafefuzu.weebly.com/uploads/1/3/4/3/134334422/0ff7c51c22e1c.pdfIn PDF document text
    • https://xinewufovina.weebly.com/uploads/1/3/4/2/134235071/4898338.pdfIn PDF document text
    • https://nodararikerat.weebly.com/uploads/1/3/4/8/134885074/095e33e.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/ZEDjwlY/34169180535.pdfIn PDF document text
    • https://vugosolisaxude.weebly.com/uploads/1/3/2/8/132814967/wojim.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/7334001.pdfIn PDF document text
    • https://cdn.sqhk.co/gapalagabig/ggij4gh/bukeniponotiruponole.pdfIn PDF document text
    • https://tonefomemozev.weebly.com/uploads/1/3/4/4/134458928/rezegenufow.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/ca2e354e13490.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/dljin1W/simozafe.pdfIn PDF document text
    • https://romidanunopupef.weebly.com/uploads/1/3/1/1/131163616/3177400.pdfIn PDF document text
    • https://tunozuranoba.weebly.com/uploads/1/3/5/3/135316660/kudebamamonisezexe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ad43fa5-cbbc-4a4c-beaf-d5d885faa395/43533385826.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/522feec1-b59e-4a75-8299-dfae2b2d555c/fem_periodic_boundary_conditions.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/38421263623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc96b6f-2b03-478c-a9b6-ee26382c1c7b/luferixisiwudonize.pdfIn PDF document text
    • https://933afb0c-60ca-4ff4-ba38-e7c804ca925d.filesusr.com/ugd/941881_afc24908ef104a5081f6647df596a700.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/miss_philippines_earth_2014_question_and_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/zefetomevimasanaz.pdfIn PDF document text
    • https://cfff6b0e-fc0f-4d9c-a983-c0e60c8b2bfd.filesusr.com/ugd/c637e3_8d506d7c6824408fa4c41a9c5cdba157.pdf?index=trueIn PDF document text
    • https://0d801636-e20c-47cf-9654-f2c4f0d28fb9.filesusr.com/ugd/2e7c9c_1af9a996cadd48daadd92fa89ac07925.pdf?index=trueIn PDF document text
    • https://67d298e0-85f4-4ad4-bf36-e1ac857e42fc.filesusr.com/ugd/b6bf5b_e95a4c195b4c4e4da3a068a5aa06c5bb.pdf?index=trueIn 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_off0000f660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF660 5244 bytes
SHA-256: 8c70e165c1708d56ad4f6a8518f7d4641c380fee9c66b037dc920d4fc25978c3
font_01_sfnt_off0001083f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1083F 11564 bytes
SHA-256: a4320b8b90dea81df9f81b4e62b02d3cef4df5810a54ed0535f0506320078f9c