Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ddb96c0b97123b…

MALICIOUS

PDF

71.2 KB Created: 2021-03-06 10:22:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 245cc3392df04cf304f6ae728f667e52 SHA-1: 34b7fa81a3c8e8f825df681dabec87471f1aa3da SHA-256: a4ddb96c0b97123be3c25dfe943b7eba8089ae0d73c24d620b5826ea61351e70
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/aws?utm_term=how+much+oil+in+ssr+125 PDF link annotation
    • http://zaxevef.getenjoyment.net/23272161609.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459939/normal_60078bb11150d.pdfIn PDF document text
    • http://soluzixod.66ghz.com/3292515026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485305/normal_603a983277969.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/84388067398.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419415/normal_5fdcfe5bb506e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449630/normal_5fffbd64d40ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495269/normal_60121954e0f2f.pdfIn PDF document text
    • http://veselutut.mywebcommunity.org/how_to_open_beko_washing_machine_door.pdfIn PDF document text
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/9972237.pdfIn PDF document text
    • https://surutadalonuta.weebly.com/uploads/1/3/1/4/131455158/tusonod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gizadopozi.epizy.com/aint_i_a_woman_speech_full_text.pdfIn PDF document text
    • http://mesawebibu.rf.gd/votikudarixefirezax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a825dfcd-d941-4107-8580-839ea9a87a62/31569064760.pdfIn PDF document text
    • http://wuresuju.epizy.com/sylvia_plath_daddy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee660882-7103-4fcb-9b4c-80783df00077/lonely_planet_magazine_india_careers.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/can_i_mix_perlite_with_cement.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/37764219780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/033e70ee-e756-409d-ab35-f73a004d1297/losanurevobedasarar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a04654e-1705-4978-9d79-0a13e530c3fe/what_is_the_tone_in_sonnet_116.pdfIn PDF document text
    • http://kulebosux.myartsonline.com/dusomovuxo.pdfIn PDF document text
    • https://s3.amazonaws.com/potofaw/power_bi_analysis_services_connector.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_off0000dade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADE 5192 bytes
SHA-256: 1e687b708d5ccad462998d41d0b89efc32c02eb56bd713d15e412d664cf70b94
font_01_sfnt_off0000ec7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC7B 10332 bytes
SHA-256: 3cd35206d41f9af387f5c3bd35f14edc57e976bf0bcc8623320fd4f207d88d80

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