Malicious PDF — malware analysis report

Static analysis result for SHA-256 502853423721588a…

MALICIOUS

PDF

48.9 KB Created: 2020-09-30 03:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7fe5f31d66ae74a44456a0d0b9ec7e13 SHA-1: 632472e950bcdb6a3aec2f102fc0e10478176689 SHA-256: 502853423721588adccc9650ce11eac058911690067f04a46739b61af4a2165a
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.
  • 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://ggtraff.ru/strik?keyword=ba+first+year+all+books+pdf In PDF document text
    • https://site-1036936.mozfiles.com/files/1036936/86076850485.pdfIn PDF document text
    • https://site-1036753.mozfiles.com/files/1036753/kaxiwagamurukejonujuju.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/74012462030.pdfIn PDF document text
    • https://site-1036807.mozfiles.com/files/1036807/degobozazikotexuze.pdfIn PDF document text
    • http://files.juliekelleytv.com/uploads/1/3/0/8/130814021/7137072.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0454/5645/7880/files/carnivores_ice_age_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4074/3330/files/82502738401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9432/6942/files/41330315976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3817/8470/files/area_and_circumference_of_circle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1016/2837/files/anubis_and_bastet_tattoo_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/peppered_moth_lab_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/i3_cheat_sheet.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6843 5072 bytes
SHA-256: a7dd78ec3c9814fe004fa50a847d30a1703c08a1e412acfbe6c931ee73058c5c
font_01_sfnt_off00007999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7999 2596 bytes
SHA-256: cb4cd20e1f313521711bc2a74fd007b9f4ce631dfc3841aa6cc8912f7210d3ac
font_02_sfnt_off00008523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8523 10324 bytes
SHA-256: 693189ca27e4033b3ef7f1678bdd7d09276da92847d7af2c2e281e3f7847abdf
font_03_sfnt_off0000a871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA871 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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