Malicious PDF — malware analysis report

Static analysis result for SHA-256 2215b8ad8836b359…

MALICIOUS

PDF

75.8 KB Created: 2020-12-23 10:09:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c5edf90be0475ce6beb7a6a02dd8d29e SHA-1: d606c94b0b8bb672414832dd419e8ddffaebfd65 SHA-256: 2215b8ad8836b3594871745b6286b8329fd1c80f4c3a9411e1b07e31309aacbe
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 0.9997

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://traffking.ru/strik?utm_term=apple+wwdc+2020+wallpapers PDF link annotation
    • https://kobuzefejara.weebly.com/uploads/1/3/1/4/131437799/6843049.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471985/normal_5fc7fb587ab0c.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/35d1cd.pdfIn PDF document text
    • https://xokekomoto.weebly.com/uploads/1/3/4/5/134598663/mebakatebaj-kidufabajen-geroliwewuxawaw.pdfIn PDF document text
    • https://wadexusi.weebly.com/uploads/1/3/4/4/134440973/d66de3988628fa.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://uploads.strikinglycdn.com/files/3aae1736-271f-4204-a34f-5303e531ce8d/game_dev_tycoon_mods_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1deac50-d0a9-475b-a76b-f752b93f4bc8/remesasovokuxiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/246efd26-fb18-44aa-8f59-8a756a3db170/sandisk_sansa_2gb_mp3_player_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46d6f6bb-c196-46a1-a853-923c8df897cb/recipe_for_cartography_table_minecraft.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/932ab01e-77d8-460d-930c-b1a167c7adc6/step_father_passed_away_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a8a9ee4-0393-42fe-a1f9-f31b6cef8a5c/jamzone_bowling_montego_bay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ad7268-4cb6-411f-b520-e9c59ad9264b/mini_electric_kettle_stainless_steel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0bd4812-7c84-4431-8537-aa0b664cc5f6/23873991298.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_off0000de55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE55 4868 bytes
SHA-256: e9427320bea51318bcedfdb0dec572bf8fdf527c0920cfb28b73306e4f271c38
font_01_sfnt_off0000eef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF3 10884 bytes
SHA-256: 9b7f54eb19d40085c025e91a901a2d7da9aca7281afaf08b7e03eef034172496
font_02_sfnt_off000113f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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