Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f714a95203936b…

MALICIOUS

PDF

44.1 KB Created: 2020-10-16 02:32:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c7b4ed30339fa01831f46300cdb0a5c1 SHA-1: b7834e340e6f4e35db024759f5d6f5f1093af3b7 SHA-256: b1f714a95203936b018d9b6cba1c02f9582ea90e890b86d8c5d6e2d61e0a5c77
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://gettraff.ru/123?keyword=mi+a3+android+one+review In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/jatelu-zukolugaw.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/xenemavurinap_jokepirewiteda_fijalezej_gemewije.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/7909875.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/3cc39988c8b.pdfIn PDF document text
    • https://site-1037124.mozfiles.com/files/1037124/83812815380.pdfIn PDF document text
    • https://site-1043530.mozfiles.com/files/1043530/85398624811.pdfIn PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/guvoxazopix-jobugeg.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/05209.pdfIn PDF document text
    • https://fusesekomufe.weebly.com/uploads/1/3/1/6/131606177/422337.pdfIn PDF document text
    • https://jemiwuwavaza.weebly.com/uploads/1/3/0/8/130814288/tigosorivibisakoxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2188/8409/files/59874456047.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4412/2009/files/folio_case_iphone_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/research_guide_for_jehovahs_witnesses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7530/9220/files/all_i_want_for_christmas_is_you_piano_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6752/3743/files/kisufine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4682/7694/files/unitech_scanner_as10-u_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8861/8669/files/opaa_food_management_neosho_mo.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_off00006e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4D 4932 bytes
SHA-256: 6dd1c77d7db25a8448c962f94b1bd783cabb632cc7aaf9392be8f4519480ccb5
font_01_sfnt_off00007f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F32 10772 bytes
SHA-256: dcf7903eb84c8a8e18664a89eacea95b25998939b10876e3d2c3b96b0e8363c5

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