Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f5e1018f8b4e8d…

MALICIOUS

PDF

68.1 KB Created: 2020-11-10 23:24:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 591daa54943679be18b7ce4b89f0e7ef SHA-1: de26e1f158ab3ee6e977d94cb6d27c6771d9a3db SHA-256: 50f5e1018f8b4e8dd52687216c6f8220de75f359af534632b9e2427f9b7c99c1
156 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. 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://traffine.ru/strik?keyword=ridgeway+high+school+pa PDF link annotation
    • https://fuvipizewovotat.weebly.com/uploads/1/3/1/0/131069886/ec6c44.pdfIn PDF document text
    • https://mosodujisar.weebly.com/uploads/1/3/0/7/130739504/pexilomofodavit.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/sakoba.pdfIn PDF document text
    • https://dabagurujor.weebly.com/uploads/1/3/4/3/134350609/1ca9a367f2ba.pdfIn PDF document text
    • https://xesaranit.weebly.com/uploads/1/3/2/6/132696194/bce0449ead8.pdfIn PDF document text
    • https://rowurasivove.weebly.com/uploads/1/3/4/3/134357219/4673024.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/xabalaru/vojegatisogeleso.pdfIn PDF document text
    • https://s3.amazonaws.com/vasofirida/dense_regular_connective_tissue_vs_smooth_muscle.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/dreams_by_langston_hughes_critical_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/unteachable_leah_raeder_read_online.pdfIn PDF document text
    • https://s3.amazonaws.com/vogubivajavofu/venus_factor_diet_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/history_of_amazon_stock_price.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/banilusewebedip.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_off0000cb26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB26 5440 bytes
SHA-256: e6873e564903f550139e871881efaa01e233e90998b9ccd92014e34d3ba44636
font_01_sfnt_off0000ddce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCE 11120 bytes
SHA-256: 6e4b2841dadb1456fa8e87427a3992654526bb354ca40a068d88850977e47e2d