Malicious PDF — malware analysis report

Static analysis result for SHA-256 409170b7647c10d2…

MALICIOUS

PDF

78.9 KB Created: 2020-12-08 14:54:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 627d6f48e2f74b4a9341afee38287bc2 SHA-1: 96d943f65e6bebf722703c2e71ed4cae5f51c43f SHA-256: 409170b7647c10d2cf7da65f50147c2a0bbb44af39a2c6e4c3522a91e81d6ecf
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://traffnew.ru/123?utm_term=skyrim+werewolf+build+fudgemuppet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5f98ab5ca8a31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370319/normal_5fc8eb92242ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460682/normal_5fc6877c9a32f.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/579d78.pdfIn PDF document text
    • https://vomediwanuxorat.weebly.com/uploads/1/3/4/3/134327005/zaguzalinesin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382405/normal_5f9825a79478d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5fbb7361d5111.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472793/normal_5fc9984120754.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/86162335-13ad-419c-9d20-9c3a497912e0/zazofowafuxogokekomejoveb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8233c9c0-90c3-4ca7-8664-453f34b294fe/paminuxesorunupexuwiv.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/cd_zeca_pagodinho_ser_humano.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/bible_study_on_joy.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/c_string_format_concat_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39013fd4-7ffc-499d-840d-d434ae5c9819/reluxebosafupoxewezaxov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/850d4e8a-fdc9-44ae-a867-1312de0024b4/filosofia_de_la_administracion_slideshare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef6e43e6-1cc3-414d-9209-b1a7287b4c2b/5541073010.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_off0000f8fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FA 5472 bytes
SHA-256: 1baca8c46e7da778411f4d9b32848c24faedb08605289535ebbc4f63eb4fdfdd
font_01_sfnt_off00010ba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA3 10372 bytes
SHA-256: e5c505ee5947e154f60c23d7467134bcd1944e632a9ba5de3545c0036400d329

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