Malicious PDF — malware analysis report

Static analysis result for SHA-256 4469397269f4edd8…

MALICIOUS

PDF

78.2 KB Created: 2020-11-26 07:22:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e85e1c8309472cb21240f94bf27425ac SHA-1: dad8d3282a09111f2c207dccc2516f23193344c5 SHA-256: 4469397269f4edd84d4a7648810696c6c0fdb9cddc2c0b9c1a1a46cc0c3b6e7c
214 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 and routes users through malicious redirector infrastructure. 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?utm_term=mcgraw+hill+sat+review In PDF document text
    • https://rugurujumififez.weebly.com/uploads/1/3/1/3/131384765/5f7ee.pdfIn PDF document text
    • https://xesapidad.weebly.com/uploads/1/3/4/3/134346602/4313952.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374843/normal_5fb2c9fda8ddf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_5f97b3a789d90.pdfIn PDF document text
    • https://japewilipo.weebly.com/uploads/1/3/4/4/134471591/2f89bcd9.pdfIn PDF document text
    • https://tololomajaju.weebly.com/uploads/1/3/4/4/134472688/f2d35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f88a85d4b562.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/f1b01a0b-3737-48d8-af90-da618fd30390/plant_cell_coloring_sheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/mill_city_oregon_weather_noaa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de499a83-1d05-4f5c-955e-867626599236/wu_jen_spells_3.5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eba4982c-c232-40a2-9b27-020ee2e0ea8e/thermaltake_xaser_iii_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7745aa0f-b127-44b0-b7ff-7d287d8e69f0/vesipodukefefewunuwitexa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88B 12204 bytes
SHA-256: 66b071934a7f192e4e5837f0fe8de5d656d5a599d2636dea36d5c388219981ee
font_01_sfnt_off0000f05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05E 5216 bytes
SHA-256: d288d1299b4f9edb50d1f19a97b50c3df2fbc0a8a1137458cf63443ec140d83a
font_02_sfnt_off0001023e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023E 11892 bytes
SHA-256: b4cc37cb3537ec681f6f95fdd96e90a10b1cd922f437b489837cc2167515fb2f

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