Malicious PDF — malware analysis report

Static analysis result for SHA-256 593946fd617fa8d1…

MALICIOUS

PDF

75.2 KB Created: 2021-06-01 05:02:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ae12632ee4dedab597ef31bbfb03dced SHA-1: 22a79f58571a168ebaf1242631346317ddb14eba SHA-256: 593946fd617fa8d1d788f08fda2e092e477c0519c6681cee0658c54baf09e9b7
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/pbw?utm_term=shivaji+the+boss+tamil+movie+hd+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485698/normal_60269a9fc6114.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470389/normal_5fc8c875bc1bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381544/normal_605ff973447e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413362/normal_60502f965b0b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503578/normal_5fff502ff104f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459621/normal_60697e9e371ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421629/normal_603fe73e438e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ruwezebom.pbworks.com/w/file/fetch/144427920/sram_red_etap_crank_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d40ad8b8-9fb7-4940-9a75-2bbd0cecec2b/how_to_put_pictures_on_echo_show_8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da019c2f-4045-4c32-abdd-27d493d14e24/xeridepapepazotefikereg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c25ef30-f662-4a5e-a6b7-4bb2538c3353/pepunujim.pdfIn PDF document text
    • http://supatibu.pbworks.com/f/gatagif.pdfIn PDF document text
    • http://vadibun.pbworks.com/w/file/fetch/144439632/974004817.pdfIn PDF document text
    • http://didaneguk.pbworks.com/w/file/fetch/144428514/online2pdf.com_to_jpg.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/f/how_much_do_miniature_dachshunds_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb1253a8-7d49-4093-8552-025f6b498787/83629830989.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7147bd69-7d13-4600-b022-6d25acfdb9c4/68519183978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c95d39-9192-4fe9-955a-c3fe6643df49/zogoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5562458f-2cc7-416e-bc55-2cc17d9d18eb/how_to_use_klein_ncvt-1_voltage_tester.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_off0000e5ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5BA 5440 bytes
SHA-256: 7cb8b524693377f4077ac549f9470c25d7b2f2bb1c3bfdd34c1f021851507431
font_01_sfnt_off0000f825.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF825 11764 bytes
SHA-256: 7f1a5891702d7aa074e4f7353b5840229bbade28d6c2b0a379f14373f4a6cf21

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