Malicious PDF — malware analysis report

Static analysis result for SHA-256 82b75cb769ac41e1…

MALICIOUS

PDF

67.0 KB Created: 2021-03-04 18:13:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7bdb0a242bd01fe7e30c2c7f6dc43d12 SHA-1: 39b6f0be8283f3b98be25ede6c0f030f6e167ddb SHA-256: 82b75cb769ac41e167ad5cc564cddd190e0d495bc332cf4d1875f4e5b659722e
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://dugedepap.ru/award?keyword=dks+1812+in+the+united+states PDF link annotation
    • https://vesodadetuvi.weebly.com/uploads/1/3/2/7/132740638/6844d6c0.pdfIn PDF document text
    • https://wovovude.weebly.com/uploads/1/3/1/3/131397940/nonibeku_xejobowa_zetutitapex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471106/normal_5ffa08f9c3258.pdfIn PDF document text
    • https://bogonifad.weebly.com/uploads/1/3/4/1/134108647/jarexixeridojolop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450746/normal_5fe01f1ad60bf.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/dewutexorob/math_worksheet_for_grade_1_measurement.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/hello_neighbor_hide_and_seek_apk_android.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/xiwatijexomaf.pdfIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_c2c7e3d70326414e9623185fd163bd71.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bulujono/87589876630.pdfIn PDF document text
    • https://s3.amazonaws.com/tibanepoxilibud/9637009229.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/gotadozu.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/how_to_get_a_written_book_published.pdfIn PDF document text
    • https://a694a867-b0fa-45cd-b082-7f9abf80b1a7.filesusr.com/ugd/430cb2_a9fdb06cb4664146966421a9620e8f92.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/xaretipafananukaredijonir.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/business_turnaround_strategy_template_ppt.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_off0000cada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADA 5228 bytes
SHA-256: ab8e99d1fd0efd91af1a118f5be8ee762ff6f5f427e695a4d563319646930fc7
font_01_sfnt_off0000dcaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAF 10148 bytes
SHA-256: f81b930402a3ea0e668b5787390214e0a29f5dd47b21346c2321c6760256fe39

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