Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e66f9402e1fccd…

MALICIOUS

PDF

78.6 KB Created: 2021-03-30 02:21:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 19357807ae45c258fc91d23159c2cc96 SHA-1: 7333573ba6f6c76b3298289132afac2dae97dcef SHA-256: 49e66f9402e1fccde93027115042fff67675892d46801cbbedcf3765908af634
232 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics and an ML classifier, indicating a phishing and potential malware distribution attempt. It contains numerous links to disposable hosting, with one critical finding pointing to a known malicious redirector. The presence of a 'download button' lure and a 'browser update' lure strongly suggests a social engineering tactic to trick the user into clicking malicious links. While no scripts were explicitly extracted, the PDF structure and link farm indicate it's designed to redirect users to malicious sites, likely for credential theft or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/strik?utm_term=how+do+i+connect+my+logitech+m325+mouse+to+my+laptop In PDF document text
    • http://gejedesoni.getenjoyment.net/ncert_accountancy_solutions_class_11.pdfIn PDF document text
    • http://noverst.xyz/rondo_alla_turca_jazz_sheet_musichqbrl.pdfIn PDF document text
    • http://newuwedeza.mypressonline.com/bmw_3_series_gt_service_schedule_uk.pdfIn PDF document text
    • http://fb-ig-copyright.com/the_circuit_francisco_jimenez_audioj7y15.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/refoxujipe.pdfIn PDF document text
    • http://getveran.site/75980163510ytxmu.pdfIn PDF document text
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/a49dbbc9a5.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/43214219456.pdfIn PDF document text
    • https://pesadosopovito.weebly.com/uploads/1/3/4/2/134235692/2405083.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/jewoxoririx.pdfIn PDF document text
    • http://gerda-msk.ru/what_is_the_term_blue_falcon_meanetk8k.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/bemoziz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jasesazolaf.myartsonline.com/sogorol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd35493f-5809-40fd-841d-edf0075c295f/24966397074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b2da248-f07f-4fde-8d7b-9eb9025c301e/steam_cleaners_hoover_floormate_deluxe_hard_floor_cleaner_fh40150.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/what_is_a_bell_jar_a_metaphor_of.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a061f18c-7c14-43e3-9773-3772ddfe3fe1/megaxezedodixovimapilij.pdfIn PDF document text
    • http://pedamodaw.onlinewebshop.net/causes_of_water_pollution_seminar.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_off0000f0ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0CA 5968 bytes
SHA-256: 2077ebac42b9790667f887503eb29ec436cd9d2b1741fe7838a1e5213caf5fa6
font_01_sfnt_off0001050d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050D 11112 bytes
SHA-256: 7b0dba75dbedfc602756bcb52cabab4fd4300f22d12a06dee04cf488db522b5b