Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f4d33126860298…

MALICIOUS

PDF

73.4 KB Created: 2020-12-21 08:57:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b19811da896185f6994123cccc4b33d6 SHA-1: f7fcc2e7940fb9d1b7385c8938ffbc0003133957 SHA-256: d0f4d331268602983e23d0375bb02a70a8a7875cf68f52f4cd1a7de1479b95fd
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 0.9997

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://traffnew.ru/strik?utm_term=draw+your+game+apk+mod PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4365608/normal_5fde3da0eb2d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424376/normal_5f99e1729cc16.pdfIn PDF document text
    • https://kulilopoxi.weebly.com/uploads/1/3/4/3/134375859/bd93c7ab457d7ef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417992/normal_5fcb20150ab2f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380076/normal_5fc9795924e3e.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/wukara/abilene_texas_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/android_games_free_no_internet_connection.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc066bd9955c744b5390948/t/5fc2354cf8cdb769c62d250b/1606563149788/depreciation_balance_sheet_asset.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc14748c89e1c4b8fc0f61a/t/5fc725a01d689b68bf95a101/1606886818370/tuvisejokulop.pdfIn PDF document text
    • https://s3.amazonaws.com/lorerexeg/free_child_chore_chart_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce1f1990e5b06becb490fe/t/5fd67de8d654060362cc0395/1607892456191/32526871247.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc16c877848ba205d1c3861/t/5fc538314f98375720888212/1606760499662/linear_phased_array.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/basics_of_ms_excel.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_off0000e229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE229 5324 bytes
SHA-256: e6034c8aecb79bfe24eee66219e0e27d638bc2f9dd7f8507a3da38cf1589e55c
font_01_sfnt_off0000f453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF453 10748 bytes
SHA-256: ed44ca21a85c0f0a3665f30dc35e6bc59809d6151ada68481809c68f8bc3c4fd

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