Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed17c7e60f19a479…

MALICIOUS

PDF

74.7 KB Created: 2021-03-15 07:26:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fb1a5f1f4c0ec94e22047e59f90079ae SHA-1: 7e7cc3d1aa513c7b7a2d5edf9c1969fb163c3a18 SHA-256: ed17c7e60f19a4797a01de754721e591b2ba75be243c2e632d2e45ac77aee274
184 Risk Score

Malware Insights

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

The PDF contains embedded links pointing to known malicious redirector infrastructure, specifically 'https://crophysi.ru/wix?keyword=305+cigarettes+walmart'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and the ML classifier strongly indicate malicious intent. The document likely serves as a lure to direct users to malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=305+cigarettes+walmart In PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/ln_nin_zellikleri5n9y2.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/64gBAjg/nhs_e_learning_and_development.pdfIn PDF document text
    • http://jigatinapa.22web.org/drosophila_experiment_lab_report.pdfIn PDF document text
    • https://cdn.sqhk.co/temududote/FuKjiba/49751543287.pdfIn PDF document text
    • http://cz-nitrof.website/oshenwatch_canada_reviewssd89e.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/brownie_painting_badge_mural_ideaskz2wc.pdfIn PDF document text
    • http://timurberg.ru/dell_u2711_instructions1c43n.pdfIn PDF document text
    • http://oficialshoes.site/spark_the_definitive_guide_oreilly_github8nkyh.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/Vzjehak/business_insider_logo_transparent.pdfIn PDF document text
    • http://artemk.ru/hide_caller_id_apk_fullu3oap.pdfIn PDF document text
    • https://cdn.sqhk.co/mojekuvugise/gQlfhjm/perfect_soccer_coaching.pdfIn PDF document text
    • http://trelon.fun/lixifivupatumufalokeb9xox1.pdfIn PDF document text
    • http://gixotakopopunod.22web.org/how_long_to_cook_spiral_ham_in_the_oven.pdfIn PDF document text
    • http://luminar3-download.xyz/how_do_i_fix_lazy_spa_e02_errorf41p4.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/3cf97a35-0696-490d-8c20-ec5cd35ec13a/8640062766.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/balak_palak_full_movie_720p_free.pdfIn PDF document text
    • http://defizal.epizy.com/23049124547.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e09e6784-5a79-4810-b5aa-2efe3f3ab0e4/michigan_child_support_ends_at_what_age.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/94824095817.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/6201841003.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/rockyou._txt._bz2_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/paguwidozotivemu.pdfIn PDF document text
    • https://s3.amazonaws.com/jinabom/15178427738.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_off0000e547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE547 5548 bytes
SHA-256: a9c7d2f0bd1c8852cfd8578a71ebc9232bc61fb8208aee1ef2a838faf66acdc5
font_01_sfnt_off0000f820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF820 10892 bytes
SHA-256: 72a80f2bfd5d90f35c9eccf98fe9d55c05c8a9345f27dd7b9523ef4fd651d19a

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