Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f6dbe46f2db1342…

MALICIOUS

PDF

74.1 KB Created: 2021-04-27 03:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c9633c640a90ea95700f17b70aec07a4 SHA-1: c5d8a43ee88dd9924ee0a57ee70d19cead0e4440 SHA-256: 1f6dbe46f2db1342d3aa471f8096c5da722835e5b0511f326f1f6820e350ea6b
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure for software downloads. The presence of numerous links on disposable hosting further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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://crophysi.ru/strik?utm_term=sap+software+for+free+download In PDF document text
    • https://cdn.sqhk.co/batumozi/dxeheia/butajixad.pdfIn PDF document text
    • http://tublitalia.space/46375507072iiu17.pdfIn PDF document text
    • https://cdn.sqhk.co/xeduwukaxusa/hjaYyjh/sniper_elite_5_ps5.pdfIn PDF document text
    • https://cdn.sqhk.co/veladaxuzeba/dDJu4lD/83934745496.pdfIn PDF document text
    • http://hydrofthol.space/beyond_the_sky_hd_moviemqn91.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/3Uhgiij/77889540081.pdfIn PDF document text
    • http://zomoxoxuriw.mypressonline.com/jujasixilaramu.pdfIn PDF document text
    • https://cdn.sqhk.co/nemalerute/gjfotgd/sajelufoxaxovifatubug.pdfIn PDF document text
    • http://suvekitubexeso.getenjoyment.net/auxiliary_verbs_worksheet.pdfIn PDF document text
    • http://kidupat.getenjoyment.net/tamofudidu.pdfIn PDF document text
    • https://cdn.sqhk.co/tibidimewako/ihSSgiT/vovenidogi.pdfIn PDF document text
    • https://cdn.sqhk.co/mikitikotak/cRTltge/lagobako.pdfIn PDF document text
    • http://priz24.site/when_dimple_met_rishi_netflix_season_2k7c7m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/35b0c325-8971-40d2-a054-82c046f6ac8c/52059789504.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/467d4f23-2cbc-4341-b9d7-f76c3ab39855/51542693068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73580767-32f3-4e40-8583-37f40175cf3c/vazatamusezibenetelosijef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eee48b1-2ef1-4d38-a69f-390960b91829/philips_srp3013_27_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcff6238-9052-4bc5-8b20-2c3bb4722252/zijewovaposorabijija.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82133caa-5a99-471d-8045-794e6b1f80ec/miller_211_welder_cart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d1dd179-7489-4cb8-8d2f-cff9f69da94c/la_plaa_del_diamant_merc_rodoreda.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_off0000e463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE463 5232 bytes
SHA-256: 93e96d18367a8bc5d7c0cb37abdc800e07c4f59f4779b2894851831c5b67e005
font_01_sfnt_off0000f651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF651 10808 bytes
SHA-256: 70305aea13d31bb8f1be14a676ada2c11c1ba192d7ef22066b04ba346a80e34a

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