Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1fe5e16c8c775bf…

MALICIOUS

PDF

69.7 KB Created: 2020-11-27 22:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3725aa8f29b8993073597e65978cd789 SHA-1: 1ffb05d470215c73d5f4008955365c29836a2654 SHA-256: f1fe5e16c8c775bf1f9d7556fd84421c9f7a5210522a0cb75ebe3ba7adbd7ac4
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://trafftec.ru/strik?utm_term=refranes+y+significados+cortos PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388156/normal_5fbf24febc389.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5fc0533bea0a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485153/normal_5fa7af2d81d0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381748/normal_5f8be0fa728c0.pdfIn PDF document text
    • https://sezibuginodeso.weebly.com/uploads/1/3/4/4/134470526/2851685.pdfIn PDF document text
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/bivevu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_5f8d8d8cd4e18.pdfIn PDF document text
    • https://jazaxalik.weebly.com/uploads/1/3/4/4/134488577/sumifiz_muxifejesej_zafujan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_5f9b8cc807bcd.pdfIn PDF document text
    • https://duxuremi.weebly.com/uploads/1/3/4/6/134623812/9625538.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369660/normal_5f8cf232abb49.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6478bc4-ddcc-4f61-ba19-a7bbaf051172/44387702588.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/23539832438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/680df8ac-de76-41da-a7c2-da4fd6587fde/38847460565.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD301 5268 bytes
SHA-256: 957ec2df437ea0ccc44f83c3636fd62f30f33e96d39acbecee0c8c7603540479
font_01_sfnt_off0000e50d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50D 10756 bytes
SHA-256: 4f660b348e4141ed3a70741cbd0c33aafb16d959eb63e5cc9855e3ba29714483

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