Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a012bd2f3dc995…

MALICIOUS

PDF

78.4 KB Created: 2021-02-27 19:22:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9a93edd09ad34925290277b78ebe9fa6 SHA-1: 5bec4a3ad90e2c104516f8c27f0f640c2582578a SHA-256: 94a012bd2f3dc99577600b03a18780c2cc2db249d4f24e1aa9d9b4bac2dc80e1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://vilenefex.ru/strik?utm_term=motu+ultralite+mk3+win+10 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459320/normal_5fc833bab72d2.pdfIn PDF document text
    • http://mijolek.iblogger.org/yeah_baby_video_song_tinyjuke.pdfIn PDF document text
    • http://riniwovefaraw.22web.org/checker_plate_garage_vinyl_sheet.pdfIn PDF document text
    • http://dupaleb.22web.org/transfer_contacts_iphone_to_android_google.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/fallout_4_mods_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464525/normal_6035bee6a87ec.pdfIn PDF document text
    • http://korogesubelokut.mypressonline.com/omnisphere_2_library_size.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500186/normal_5ff90205cdb9c.pdfIn PDF document text
    • http://jikusofare.mywebcommunity.org/wexobolusafizoviz.pdfIn PDF document text
    • http://gezilobogobig.22web.org/32273126354.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375207/normal_5ffa6faeae61e.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/fitafaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470972/normal_602b0376c5c1d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rivenoke.onlinewebshop.net/how_to_pair_scala_rider_q3_with_phone.pdfIn PDF document text
    • http://surenus.epizy.com/rujajadugib.pdfIn PDF document text
    • http://kisalonokexiwi.atwebpages.com/what_is_the_definition_of_thermal_conductivity.pdfIn PDF document text
    • http://rakikazava.rf.gd/nukozerezafekuwedidu.pdfIn PDF document text
    • http://kiwasebax.epizy.com/56548283110.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/14707860419.pdfIn PDF document text
    • https://s3.amazonaws.com/tezude/mr_coffee_iced_coffee_machine_with_tumbler.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/how_to_replace_jbl_flip_battery.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_off0000f5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E5 5172 bytes
SHA-256: e13c8aac602579a87be077beeffa81e5cd915e2a9ba10371125fb41208131f13
font_01_sfnt_off00010788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10788 10712 bytes
SHA-256: 439c0ea31afbedfbf7baabda844255ee3538b007b2c33a798d9b93c781780abb

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