Malicious PDF — malware analysis report

Static analysis result for SHA-256 893906e06d251f6c…

MALICIOUS

PDF

72.9 KB Created: 2020-12-20 17:51:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c873a639f0c6f897e2f45bdb748d2dec SHA-1: 1d8876e7ee34355f4e08b7d8e43fbf0b64106046 SHA-256: 893906e06d251f6c3b97c74d06dadd8d46c0c180ccf553c845e5426f6d08541d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs, with a primary focus on a URL that appears to be a redirector for a phishing or malware campaign. The document body, though heavily obfuscated, contains text related to 'Osrs barrows guide 2020', suggesting a lure to attract users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://trafffe.ru/strik?utm_term=osrs+barrows+guide+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5f8f488bb48f3.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/8373051.pdfIn PDF document text
    • https://moxetutatag.weebly.com/uploads/1/3/4/2/134234950/a90cb6069.pdfIn PDF document text
    • https://nagifinapu.weebly.com/uploads/1/3/2/6/132696111/kegumokiwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411932/normal_5fcea31336a84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e464ab79f442f229936f/t/5fc15fae5147b1480466e70c/1606508465098/partes_del_motor_de_un_carro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61ebd28d-75ec-4d3d-bef1-75b4cde4d611/5_georgia_regions_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ac2f892-625e-4126-9311-00b1fc94677f/2020_calendar_october_free_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e0fc239-6c42-4ee0-b0e3-42f1a70fe653/92590629741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61e06e98-1bb2-4a67-80c7-c04452215966/72540368165.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d135bf71053ccb0fc630/t/5fc29802145a8629dc054100/1606588419114/86168102296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b1f4ca3-263a-430a-99aa-2c3855e374ec/tefamesoliludelinizubufe.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/hayward_colorlogic_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/osmanl_imparatorluu_tarihi_ahmet_cevdet_paa.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_off0000e084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE084 5492 bytes
SHA-256: ce829d8f39d1ea57dde0e5ce92014258c8924091f5278689cd7885c919026e24
font_01_sfnt_off0000f349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF349 10564 bytes
SHA-256: 51397ff229d362118aa0356b0cd699b06d827126d37c03293c625e3b9846a331

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