Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0742e1a3ba38b21…

MALICIOUS

PDF

73.1 KB Created: 2021-05-22 03:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 686c53be6c486eb44a16e13ecd8c0d1e SHA-1: 97843e418286de4f344fb050c3af4952529ff83e SHA-256: b0742e1a3ba38b21019ff796e45e5a3bb3e23d3713b8bdf02fca4bb5dc31e8cf
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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
  • 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.
  • 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://seumenha.ru/strik?utm_term=interview+questions+for+apartment+maintenance+supervisor PDF link annotation
    • https://xagofutaruv.weebly.com/uploads/1/3/4/3/134344009/runakizadorebim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489852/normal_5ff8c91116092.pdfIn PDF document text
    • https://bobiputab.weebly.com/uploads/1/3/2/8/132814039/jasob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418783/normal_606adc2c480ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382418/normal_602727bcda02c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369520/normal_5ffb545236a3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456399/normal_601fe1e4aeb3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451352/normal_6021bdfbccd40.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463824/normal_604d0a2130760.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464083/normal_603197001acc0.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/cfb9fc68-fd39-4288-ae3e-cbbda148eef3/rainbow_vacuum_cleaners_on_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f373ed-50fc-45f1-a8cd-499c6116dc40/how_much_does_directv_wireless_genie_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/26203760506.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/vudeve.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/javascript_date_now_format_to_string.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb546503-65cc-4e7b-89a9-e1a66ffd6913/jbl_flip_3_waterproof_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dddd8a3-5229-4e17-8276-3c5236f51652/xupusasevufutiziwadas.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/alberic_de_bordeleaux_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb3e30e3-877d-49b6-a561-c19c48782cbc/can_i_use_my_iphone_as_my_tv_remote.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_off0000e0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CC 5344 bytes
SHA-256: 3fd0798a0d07749643d1ae5c46680b0b2750cffeb5cf6444252b364f5c99f038
font_01_sfnt_off0000f306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF306 10556 bytes
SHA-256: c26762664ad1fc7e3ccd8ae1c1e4b24afdb4acb01d223558ed5d694aa2496f32

Open this report in the interactive analyzer, or submit your own file for analysis.