Malicious PDF — malware analysis report

Static analysis result for SHA-256 997cca269c7817bf…

MALICIOUS

PDF

74.2 KB Created: 2021-03-28 08:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: caa8af50f47532bc19447b05f6470d6a SHA-1: cfe016dfabf2ece7cd8a43576e927b3c0895d601 SHA-256: 997cca269c7817bf4791bfa8285d021db5a33149aedd8eaebe46f9d810bfadb0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. ClamAV detection and ML classification strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/123?utm_term=8+ball+pool+miniclip+apkpure PDF link annotation
    • https://cdn.sqhk.co/lakisitu/YrAQifG/luwanefomutowatejuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/rekubapapup/iAjafgf/xafuk.pdfIn PDF document text
    • https://cdn.sqhk.co/zanudiwageg/3ANIsha/resuzizunupepin.pdfIn PDF document text
    • https://cdn.sqhk.co/kurazagizub/kif1gdt/monster_destroying_city_game.pdfIn PDF document text
    • https://cdn.sqhk.co/fedijadika/ughjG4S/15678149479.pdfIn PDF document text
    • https://cdn.sqhk.co/debefuki/FfMnOhc/pocket_mine_3_best_gear.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/tkN5Xjd/gitakatabugejipaso.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/oEldKYI/tevitaxukevafen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368741/normal_601be19a3e5e9.pdfIn PDF document text
    • https://cdn.sqhk.co/kagalitisup/jdkagjP/stickman_archer_defense_game.pdfIn PDF document text
    • http://zeputixov.22web.org/23821028956.pdfIn PDF document text
    • https://cdn.sqhk.co/zewezerezi/hhhhtmp/63828712565.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387806/normal_5fcbd41510a8a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fezekugagow.rf.gd/juzeposedemus.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/sukulirezuj.pdfIn PDF document text
    • http://ragoziminazu.epizy.com/25913037458.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/world_news_daily_reporter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10dd1dbb-ca44-45cd-b80a-262f74b661f8/java_soap_web_service_example_mkyong.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9924f82-7b53-4dd8-b6f8-3e8319fab48a/72829114012.pdfIn PDF document text
    • https://s3.amazonaws.com/kodipopujufipig/prefix_suffix_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85491f9d-20ee-4bf8-959f-561e9f2fb1bc/29890207830.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/vuwel.pdfIn PDF document text
    • http://xarirog.rf.gd/24049495007.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_off0000e3fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FB 5204 bytes
SHA-256: 82347adaee9848b97cd1ed9c2d565bc18f8d8317345b86ac6de07412fdffaef0
font_01_sfnt_off0000f594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 10636 bytes
SHA-256: bd5d0225fb7213889b77398376a2aaf12c4a8add390b9c308b3e6a5cc5fb16b3

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