Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3fd2899e4ab6378…

MALICIOUS

PDF

76.2 KB Created: 2020-11-24 21:40:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: bb60ddbf18666835af3d87dadfcbc0e7 SHA-1: df69770729e1dc294feeb2319b814db712591122 SHA-256: d3fd2899e4ab6378854aa9a2fc610cefa6e2e4ef18ce9a6909539e4b3dc5d1da
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafficel.ru/123?utm_term=homelife+led+lights PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388406/normal_5fb2cabb61749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383791/normal_5f8e334dabbed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_5fb425a6188a4.pdfIn PDF document text
    • https://gogimorezi.weebly.com/uploads/1/3/4/3/134316220/7577390.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367286/normal_5f90c7b3afbd3.pdfIn PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/251352.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5f8dbfe824670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376105/normal_5f8d4b4fb2308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381971/normal_5f98e058ee9aa.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kirorafagosox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pafexegud/driving_test_examiner_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/737426083.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE318 4660 bytes
SHA-256: 6473d2b53fcb19f9c9e4a90e3a6fc46e5011f632648fbce322e79da1c1245702
font_01_sfnt_off0000f2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FA 10288 bytes
SHA-256: 4074d04377be6aeacf52df1240d99ab02293458637342495c954c57592eae394
font_02_sfnt_off00011639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11639 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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