Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c995d3eeb955fc8…

MALICIOUS

PDF

81.5 KB Created: 2021-03-16 23:25:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2e54f16cf147115b8b778b25b5cfb109 SHA-1: e5f00cfb64fcd435ad1bf3e1ab61ea98dd105737 SHA-256: 6c995d3eeb955fc8bfaebcb04d6af703f79f0c81cc881803f41ce4ef4d72b330
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/strik?utm_term=salvage+camaro+for+sale+ebay PDF link annotation
    • http://rasipafus.getenjoyment.net/how_to_change_a_3d_polyline_to_2d.pdfIn PDF document text
    • http://xajabuzowa.scienceontheweb.net/82568331825.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/bukidu.pdfIn PDF document text
    • http://nitanupemil.mygamesonline.org/jetofunajixebe.pdfIn PDF document text
    • http://funasowuto.getenjoyment.net/lewugiluteweloboleborixub.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/what_is_the_order_of_the_harry_potter_series_movies.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pegozegi/biological_molecules_exam_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/ralph_ellison_invisible_man_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8c716c4-aaf8-4091-b3c4-632c962b5fbc/how_do_i_make_simple_syrup_for_cakes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76e9b855-7e5e-48fa-8179-e8c94c264a39/wizifixavidakalox.pdfIn PDF document text
    • http://jarunotaso.rf.gd/apk_audacity_untuk_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4064dc-7de4-4aa2-8288-00cc40d86053/how_to_treat_diabetes_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c165be39-d11e-4d4c-8163-95a422c42bdb/wejalovuvosi.pdfIn PDF document text
    • http://vebusatoro.atwebpages.com/riparadafet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d45e55-976e-40c1-8726-91e8de68d83f/how_to_do_a_metabolic_detox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00aadc4f-cf22-480b-b8d9-b1735458bd1d/kenmore_elite_washer_guide.pdfIn PDF document text
    • http://dozuxix.myartsonline.com/zikadudisi.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/sizepemak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaf1076e-5d4a-4156-b10a-f1d923a09ce7/40204432646.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/korago.pdfIn PDF document text
    • http://pumovumibabir.epizy.com/wufusifod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4496685-58a8-48f7-b1f3-0ad0765c7ef8/xilebineno.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF431 5160 bytes
SHA-256: 68364c5e9ca43b2ee728bfd62a04823d13b9536ba60b897ee9a40de83b132ec4
font_01_sfnt_off000105c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C3 10776 bytes
SHA-256: 2a6da0a261ea9ffea175fa89ae0f4f41382d6c1f2ae66d5fb9c7d1d1fe925a38
font_02_sfnt_off00012a9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9F 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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