Malicious PDF — malware analysis report

Static analysis result for SHA-256 d264769a4cbb8565…

MALICIOUS

PDF

75.8 KB Created: 2020-12-21 10:22:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8cc76530fc12944697110cf82f21a2bd SHA-1: 5bb31eece384cc453d40d93b19a29355622da537 SHA-256: d264769a4cbb8565c824a3e4f979de66445218a67756568573544874bd119401
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 0.9996

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://trafffi.ru/strik?utm_term=spaceflight+simulator+download+mac PDF link annotation
    • https://kuvikupomudu.weebly.com/uploads/1/3/4/4/134457818/bazepezuwiluvu-nipuzofu-jajelodon-ludagi.pdfIn PDF document text
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/216761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376354/normal_5fbea62e1b34c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373004/normal_5f890538cf2a5.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/nenademujurage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_5fda473d2b0cc.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/senodiw/50002575989.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/navulizimafusab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9303be7c-65ad-4cd9-b9a8-b48e1da39d7d/off_road_rider_insurance.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/90398254427.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/zoxozizezesezinonaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba59fd36-be65-4d95-b535-954c78065818/35419462693.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/python_3_for_windows_10.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DD 5644 bytes
SHA-256: 786fc1c2c2c4f71f405d1b69d4b9b33632b98e6399c6a57ea77ca9b14d595f65
font_01_sfnt_off0000e6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E8 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off0000ef76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF76 10708 bytes
SHA-256: 6e021131ca7a46cfb8516c70f4b75dd7aea5f412df2428ed6cd0b9080ffe8dc1
font_03_sfnt_off00011401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11401 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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