Malicious PDF — malware analysis report

Static analysis result for SHA-256 90eba6791c698752…

MALICIOUS

PDF

75.4 KB Created: 2021-03-25 14:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a2e0afd011174f2d5057fea2ee857b36 SHA-1: 22560c0969ea760aa2af172dbe0df60c5037acbe SHA-256: 90eba6791c6987522655a78ee45dbb92a1b45180e98da1e3a2a681e82603201f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The document body, though truncated and obfuscated, contains references to 'Cnn news us presidential election', indicating a potential social engineering pretext to drive traffic to malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://vilenefex.ru/strik?utm_term=cnn+news+us+presidential+election PDF link annotation
    • https://cdn.sqhk.co/zikufivol/iftifcY/52886425227.pdfIn PDF document text
    • https://cdn.sqhk.co/ninilevikod/jif0iib/red_ball_game.pdfIn PDF document text
    • https://cdn.sqhk.co/jakufomego/Q3Cvhic/20709293407.pdfIn PDF document text
    • http://velibabup.iblogger.org/liremaruwim.pdfIn PDF document text
    • http://nuvagefo.medianewsonline.com/how_many_branches_of_burger_king_in_the_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/sakupiraf/iaNkgiO/quran_tafsir_ibn_kaseer_english_free_download.pdfIn PDF document text
    • http://lirinevewafa.mypressonline.com/73063001722.pdfIn PDF document text
    • https://cdn.sqhk.co/zidulibu/Y8KhcZ9/download_drake_n_trap_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kuroxawoja.rf.gd/dofineroberinevajijedadoz.pdfIn PDF document text
    • http://kuwijiti.myartsonline.com/retanenajoripulorosu.pdfIn PDF document text
    • https://2eda13a9-9e0f-47dd-bbfa-a9a5028a3314.filesusr.com/ugd/61c57f_6f74d645092f407fa55ed8395033cd95.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/db5889c0-573e-4a60-b302-933901384b4b/75732859363.pdfIn PDF document text
    • http://lanosebezazov.onlinewebshop.net/emerson_the_american_scholar_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d46b6522-b780-4170-944d-a28073627453/73609346943.pdfIn PDF document text
    • https://e82ff0bd-cb1a-4782-8b92-0a0fb7657660.filesusr.com/ugd/d17951_cce2be7b2a754e008661bd97d424b49e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/96ab37f1-1f61-4ce6-b219-d29033ccede8/gopro_hero_4_silver_update_instructions.pdfIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_62eb066cda2448ea82ea3f5df16bef0b.pdf?index=trueIn PDF document text
    • https://84d51d8d-5932-465a-b044-5d36dace581c.filesusr.com/ugd/98e2de_0924c1b69871497ea1b2713ec4e4fdc8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c6eb198-325a-4877-a6b6-8961e552f3c4/biochemistry_book_berg.pdfIn PDF document text
    • http://nabikelotedabe.epizy.com/wakozomadabaxepoborefaf.pdfIn PDF document text
    • http://likifodafiduno.epizy.com/how_to_use_a_garmin_approach_s10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45c90b5c-fd83-4aa2-9458-c5db8cee9297/wordpress_bangla_tutorial_free_download_2019.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_off0000e81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81E 5064 bytes
SHA-256: 8bac5bd033bc20f35dace5b6b66c14af4be1496b84060e6f59dc51baa920b2b9
font_01_sfnt_off0000f96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96F 11372 bytes
SHA-256: 04aecffc3d2f0fe2965a2862f9560684c18ff74e5938c30e732315070f66a7b3