Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa130ae904a4d9d0…

MALICIOUS

PDF

76.9 KB Created: 2021-05-08 12:25:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: cabdc3b14032aa81b90dc0b28d8e4a4c SHA-1: 967d515d3d81bb57bc12282049735ecf9b20badb SHA-256: fa130ae904a4d9d0874ea1a9a9cd37e0abc571727285323b4ad5d83ef9fec8ef
186 Risk Score

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 0.9993

Heuristics 6

  • 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.
  • 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://dugedepap.ru/strik?utm_term=business+mathematics+13th+edition+answers PDF link annotation
    • http://gepokupaburorew.mywebcommunity.org/bbc_compacta_class_11_english_solutions.pdfIn PDF document text
    • http://lnstagramlivesupportcenter.com/atem_1_m_e_production_studio_4k_manualg0l3j.pdfIn PDF document text
    • http://crubr.space/bharat_movie_song_hdh0u8l.pdfIn PDF document text
    • http://canlisohbetim.net/mutowolirezorutitisilujo4o87t.pdfIn PDF document text
    • http://redirunna.xyz/top_paid_android_apps_kickass_2018kn5l5.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/juvupelazekelos.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/manupafuxifuzixugiw.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/cards_against_humanity_cards.pdfIn PDF document text
    • http://italia-doc.space/41008827645jiq8l.pdfIn PDF document text
    • http://brumbum3.xyz/telugu_dubbed_movies_free_download_2020o69q3.pdfIn PDF document text
    • http://magnitoli-2ekran.site/what_would_you_do_in_first_90_days91lxx.pdfIn PDF document text
    • http://sunmarkt.ru/925078656594u5r1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/how_many_prayer_beads_are_there_in_sekiro.pdfIn PDF document text
    • https://a2ae8793-a99f-480d-a3bc-849ef63d34f7.filesusr.com/ugd/cc207a_aa0fcedb8bd44fb28f6eeb2de1ea6bdb.pdf?index=trueIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_e7a70f9ddafe452d8ed87c7c8d620eac.pdf?index=trueIn PDF document text
    • https://6e345194-e688-4037-aa24-2ff230a16836.filesusr.com/ugd/ce9fe1_cfdb63c6e8e84cc78a6d8a6592fd8b09.pdf?index=trueIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_62c9c3cd92fc462cadd47ab1075ecbef.pdf?index=trueIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_12802ca19c37405d9ccd271ee4764474.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/robolur.pdfIn PDF document text
    • https://8fa10226-37c2-454d-bd65-ced70ecbf0c4.filesusr.com/ugd/c34aa9_ae15f28c51b44860868f57bfdfe12a8f.pdf?index=trueIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_ca73f27e87f147269b6bb05d0383076b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/cassie_guide_scp_sl.pdfIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_8172240409874da4b4638f973caa07ff.pdf?index=trueIn 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_off0000eddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDC 5504 bytes
SHA-256: 90233fc1147ee56a054f866ee00d40f16179d6bae15d5be018306ac93ccb8ca7
font_01_sfnt_off0001007d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007D 11208 bytes
SHA-256: 05321b49f9b87e0f50fb1e26025e934091f6e1d906e35aebb06c92c10d92f50e