Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa011a5c81b57a8f…

MALICIOUS

PDF

96.8 KB Created: 2021-03-21 23:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e7148a8adcc71d9790210698967af84a SHA-1: 4e45a8081642eeda0761506bca1848c3fdd7e513 SHA-256: aa011a5c81b57a8f026f72f225ebdd7f5aabedc3f07cf814782557c9d300957d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution scheme. The PDF structure and embedded content, though heavily obfuscated, are consistent with attempts to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=cervical+cancer+screening+guidelines+ascus PDF link annotation
    • http://unlockdeals.shop/how_to_find_the_sum_of_rows_in_pascals_trianglevwtka.pdfIn PDF document text
    • http://kawlites.online/35694435435vh3b2.pdfIn PDF document text
    • http://konsalting.info/rijose6oxjk.pdfIn PDF document text
    • http://dress-russia.ru/lord_of_the_flies_simon_character_analysis_chapter_1oqowv.pdfIn PDF document text
    • http://itanto.space/qmp_board_army8zaex.pdfIn PDF document text
    • http://golomashvanna.xyz/43788086139zrve7.pdfIn PDF document text
    • https://cdn.sqhk.co/gutifusuf/jbDyhfl/money_express_pr_horario.pdfIn PDF document text
    • http://wacc-cat.org/eureka_enviro_steamer_350a_manualkmegv.pdfIn PDF document text
    • http://nekevofitoruzat.22web.org/odia_video_song_mp4_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwewiwudesi/bmidogh/bluey_and_bingo_party_decorations.pdfIn PDF document text
    • http://domsale.xyz/61328809493gpss8.pdfIn PDF document text
    • https://cdn.sqhk.co/zivupowixede/eRhdhfS/easy_continuous_granny_square_pattern.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/sefukirexuwekij/graco_magnum_project_painter_plus_tips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d80075c-20ef-4603-9305-1ef8b564a62c/homer_kelley_the_golfing_machine_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdce75f1-cf21-45ba-a456-c7ae363bdd02/how_to_adjust_pressure_on_craftsman_pressure_washer.pdfIn PDF document text
    • http://luvigewe.rf.gd/critical_race_theory_in_education_possibilities_and_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/janubibodef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/583af50d-084f-4d88-a0a9-2486ca5470f6/how_to_install_oracle_12c_client_on_windows_7_32_bit.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FC1 5072 bytes
SHA-256: d8850f57e17c5b2a358f95b749296ef43aa91bf44a7a12ddaf0785cf57d95fb0
font_01_sfnt_off0001510e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1510E 10960 bytes
SHA-256: 828ae6504ab2fe398b4b4fbceef291e46e6b96a177947aad53adc426c97bc226

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