Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a186ecc9cfdf3f1…

MALICIOUS

PDF

76.4 KB Created: 2021-03-27 16:43:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d263fee03148b785a969bd2eb8582966 SHA-1: f81c88b8db8f38a0494327aad1065a84a7088ab6 SHA-256: 4a186ecc9cfdf3f1696b044e901359d95c4cba41b753cad6e781fcb962d1a11a
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, many pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicate that the document's primary purpose is to redirect users to potentially harmful websites.

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
  • 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://soxebez.ru/123?utm_term=storytelling+techniques+for+digital+filmmakers+pdf PDF link annotation
    • https://komijeji.weebly.com/uploads/1/3/1/6/131606126/868704.pdfIn PDF document text
    • https://kowedeta.weebly.com/uploads/1/3/0/7/130775164/3326894.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/t_fal_pressure_cooker_walmart_canada.pdfIn PDF document text
    • http://zagejudivavi.sportsontheweb.net/fowuzevaxaboradimezo.pdfIn PDF document text
    • http://wizapivizesib.mygamesonline.org/xiserumozeregepimikuba.pdfIn PDF document text
    • http://look-hotel.com/oreck_xl_2000_parts_diagramyzrpc.pdfIn PDF document text
    • https://sulagumafiwez.weebly.com/uploads/1/3/1/3/131383207/wumeja_sagetujunu_kusadajivuresem_tasupitewob.pdfIn PDF document text
    • http://sabumow.mygamesonline.org/27420143861.pdfIn PDF document text
    • http://wide-do.top/how_to_get_autocad_certificationta7p3.pdfIn PDF document text
    • https://kibasixeb.weebly.com/uploads/1/3/1/4/131438563/aa40a17.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/mouse_guard_books.pdfIn PDF document text
    • https://poxobavu.weebly.com/uploads/1/3/1/4/131453713/7089982.pdfIn PDF document text
    • https://zofumevovuve.weebly.com/uploads/1/3/0/8/130874077/1905945.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/6e84aef5-bb21-40a1-bbf4-dfdc820b9d37/41422041727.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb9fd64-b366-44ff-96e5-9e16765be8d6/char_griller_smoker_settings.pdfIn PDF document text
    • http://binuwuzipu.myartsonline.com/44364640571.pdfIn PDF document text
    • http://pikaderobiw.atwebpages.com/how_to_make_book_in_illustrator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/604e8f73-84fa-40f3-85fd-7feae117c562/bose_lifestyle_48_price_in_oman.pdfIn PDF document text
    • http://zerowegujij.onlinewebshop.net/sony_str_dn1030_subwoofer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab72a4ba-c203-49da-a6e3-31633d90df6b/english_speaking_grammar_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d02ce3e-7e6f-4c66-bbd6-397da9cb534a/futinevuwukipozafejezax.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_off0000ea7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA7C 5964 bytes
SHA-256: b49bec9adc518dbb8f7717d8389c74b5cbd24b7edb5ec95e3347197a5fe49b4f
font_01_sfnt_off0000fea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA3 10448 bytes
SHA-256: 064b1204ab1b492c9eafec930a351e32671ff455a91a5c50a1519880c3b5213d

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