Malicious PDF — malware analysis report

Static analysis result for SHA-256 d251c4e7b9008247…

MALICIOUS

PDF

65.5 KB Created: 2020-12-06 00:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7ead75c502268d28b91106d15aed43a5 SHA-1: 2afee59885fafd053aa039251aff3b3a4eaa2da9 SHA-256: d251c4e7b9008247e661cac623c2fa3b6d0b6aa48ad8140876b9b02e4ea07a76
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 0.9982

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
  • 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://gettraff.ru/strik?utm_term=free+ringtones+in+spanish+music In PDF document text
    • https://wedezetepeb.weebly.com/uploads/1/3/4/5/134528952/9671613.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc674b111f6a41984abc95a/t/5fc82cd7dcb5b2607971d36b/1606954200232/dc_comics_films_netflix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f9d66a-3029-40ae-8e35-143fcba57fa6/womenufidixumobimajatizi.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/gotedonunoxatozanono.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc689fec14dfd36fe18787c/t/5fcc05c4e43f2b00a89440d0/1607206340218/slice_game_perfect_cutter.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/opera_browser_for_android_2._3._4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bc44d06-3581-475b-8e97-e4f7f152d884/vuzukebukibidulexoleb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0b373fdc31513a1196f7/1606224697397/hahn_appliance_outlet_inventory.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2f58b2cf09257bd796827/t/5fcc07887ae85b53b27db426/1607206792304/modern_warfare_battle_royale_leak_video.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_off0000c37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC37E 5272 bytes
SHA-256: f27f087c045ded6f374faac4260a3bae3939c25223ab673eeb02c9408a23b805
font_01_sfnt_off0000d54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54A 10632 bytes
SHA-256: 6b53661aa0c45fab7543fa7e0c36402be265dd77bf44206521dcf1e6b6922265

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