Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c9362a42c1a19ac…

MALICIOUS

PDF

74.6 KB Created: 2020-12-13 14:11:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0a50876eaa1d32f1a5d900ee3f8e0037 SHA-1: 968a225a65ab1185f9031b93ba97520d656ca20e SHA-256: 7c9362a42c1a19ac869328fe470b8cda1a357a95676f12c85b8ffddd552b81cb
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-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/aws?utm_term=osrs+barb+assault+collector+guide PDF link annotation
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/0eafef6e.pdfIn PDF document text
    • https://sezemizom.weebly.com/uploads/1/3/4/6/134622585/25b10.pdfIn PDF document text
    • https://pesajupamobe.weebly.com/uploads/1/3/1/6/131607203/rorufamix.pdfIn PDF document text
    • https://mosodujisar.weebly.com/uploads/1/3/0/7/130739504/bolorinegefu_siguzoba_vominalone_rikexiju.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/a7772f94-f883-4d74-bb56-5e6ad4fd7eea/expiation_ian_mcewan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e0d520-9a26-4835-94a0-592742e48c97/characters_it_s_always_sunny_in_philadelphia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92ca4e66-9d52-45c5-a2a6-42eb2ceb36f0/carbon_monoxide_detector_first_alert_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/chamma_chamma_new_video_song_pagalworld._io.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb685de9-6d5b-494f-b190-3968b0ca0a02/42572674967.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/firen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87b0934f-30d8-4f71-8a40-a29c238c5f1a/la_soberania_de_dios_chuy_olivares_m.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ec87088-48f8-4288-b9c5-b36dc0485b9e/guitar_with_w_on_headstock_-_james_taylor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86e007d0-885c-4dfd-95d6-3c8b3763aa79/lasiwifuj.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/vaginal_bleeding_in_dogs_after_being_spayed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b872709-76dc-416b-83d3-8b4c6cb49019/war_of_clans_cheat_your_way.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd136fdf-be36-4b62-8b1c-e4915547528f/wasusefoziwizowejazeme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbdc19b0-da64-4c8a-b60e-f37a3c8c529b/musigopamosawirurozom.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_off0000e6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A6 5276 bytes
SHA-256: bac3d255572a5f6643474778086a83b86adc4911d4ba4bd78ce0568256c86f38
font_01_sfnt_off0000f893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF893 10852 bytes
SHA-256: 2bf2acdbf6792f92b5f2107ae458a3f438f9c728fbf86d4f2df78683b5b619dd

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