Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ec8ce2fd1edab5c…

MALICIOUS

PDF

64.7 KB Created: 2020-11-16 20:16:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5af8f9866c83764b130bdade0fcfee3f SHA-1: 9c8ad95ed211013fb7e231433f877db69278dc97 SHA-256: 5ec8ce2fd1edab5c9ea48907184d04a34acd5be12283d69ebd5de3c278caf0fc
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/strik?utm_term=the+very+hungry+caterpillar+worksheets PDF link annotation
    • https://xuvosaxefon.weebly.com/uploads/1/3/4/6/134605895/2537251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389576/normal_5faa137542a03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406516/normal_5f968d33590d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393488/normal_5fad90f5615af.pdfIn PDF document text
    • https://safusubugem.weebly.com/uploads/1/3/4/6/134609944/lovitij-wevija.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454302/normal_5fb27eb0b968f.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/73e3dcb3-57d0-44d9-a52b-ed6ae75f933e/stream_hunger_games_movies_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/996eeb52-310e-4402-b5cc-c858e047d24e/sedigoxemi.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/jixosoradasopiwude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3a836e2-d03a-4685-99b5-e8117ccb3cd7/mutegofafaparako.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/9911911831.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/homebrew_channel_wii_mini.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/34327730389.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbb5f9df-6ca7-495c-b135-29c287363483/dajajofedo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5623b266-5a36-443e-9d0d-5e4511d455c9/30457244291.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_off0000bec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC9 5464 bytes
SHA-256: c2f59c36d3ccbd7ecc889dd31ef453b9f8665e8f4893c0782d229eecef0a454d
font_01_sfnt_off0000d17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17D 10584 bytes
SHA-256: dfcf3c58b374188534ae9cafc9226a1c9f9482daf0c645b9b182cb41bc4de950

Open this report in the interactive analyzer, or submit your own file for analysis.