Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2d1778b89b4ab0…

MALICIOUS

PDF

62.5 KB Created: 2021-02-20 04:57:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7cef91298cbc0ffbcef0009572d3322e SHA-1: 2ce081404ba045de0993d36a4b827fc8d4b7240b SHA-256: 4d2d1778b89b4ab085339e06d7bd7d159ee7f778ffa55dca4cd4097411be2b87
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://leonvi.ru/123?utm_term=redhead+gun+safe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4477156/normal_60304abd72410.pdfIn PDF document text
    • https://lividuxu.weebly.com/uploads/1/3/4/3/134354071/c5557c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472484/normal_5fdf0ef688163.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421624/normal_5fdbe63283634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387566/normal_5fee97e5e762e.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/leduluvup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376866/normal_5fc69de2e75be.pdfIn PDF document text
    • https://sutulozutujak.weebly.com/uploads/1/3/4/8/134884412/mivido-tosuzu-kajitifaluzo-dowitizavazufer.pdfIn PDF document text
    • https://jubipolofolexi.weebly.com/uploads/1/3/2/3/132302872/metamal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499935/normal_600d615b1c474.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426832/normal_5ffefc4493cef.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/3504562.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427282/normal_5fe0fa7f6c3fb.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/rilexazejuzovep/gajokavapesedamutobojokib.pdfIn PDF document text
    • https://s3.amazonaws.com/samopakamefap/rv_bunkhouse_mattress_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/copper_sheet_grill_mat.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_off0000b6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6F8 5048 bytes
SHA-256: 0d6d7d5c87e276b6b511bdf9d831d84599628255cc3b3c3beede7c05672944f7
font_01_sfnt_off0000c82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC82D 10604 bytes
SHA-256: 359be67c577c5baf6d8930305ee1346c5788327a0de6515e7fe9f378d7fbefb2

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