Malicious PDF — malware analysis report

Static analysis result for SHA-256 042deb8b00da8fb0…

MALICIOUS

PDF

142.9 KB Created: 2020-11-17 15:10:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8df2aeb24bc77bbfd5e1976d4e18354f SHA-1: 11b8354a1d93759410d96a93805f7307f6b024c7 SHA-256: 042deb8b00da8fb00794ccdd7e7ac2090e519ca2e6be75dd0992e9103339f029
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 0.9995

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://trafficel.ru/aws?utm_term=city+skyline+android+game PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370541/normal_5f8836ebc0df8.pdfIn PDF document text
    • https://sixopumep.weebly.com/uploads/1/3/4/2/134266524/7245058.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404308/normal_5faed85d6f635.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465274/normal_5fa8901c435a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f9baaa55a976.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f8760ff2a0a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418199/normal_5f987f006b47d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374021/normal_5f938b8ad57f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376103/normal_5f9634fc909f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448735/normal_5faa365f437c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418778/normal_5f9b13312faf3.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/vezumobigodub/61736229350.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_off0001f6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F6DD 5216 bytes
SHA-256: f7221747b4b8dca4f331658460889ae24b867ce3a56df91bb56b10fe094859ba
font_01_sfnt_off00020890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20890 11300 bytes
SHA-256: 2c79b8cb71a950a01c885a948b21367636dc44d1f1929137b82ce7e3bc1f7abc

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