Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fbe072377460794…

MALICIOUS

PDF

38.4 KB Created: 2020-08-28 07:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 42be06a41fe6808b03f9d64f22203358 SHA-1: 3369dd01e31091060b7bf89c276fc667684b55b1 SHA-256: 4fbe072377460794695165ead52db814fc810d27dbd4a776b62fc1511e6c87dd
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://ttraff.com/pify?keyword=bushnell+345+telescope+manual In PDF document text
    • http://files.athensprep.org/uploads/1/3/1/3/131398117/019d9a508.pdfIn PDF document text
    • http://pikuzofez.creativeeyedesign.com/uploads/1/3/1/8/131872225/c3b9c6d5f83ad.pdfIn PDF document text
    • http://files.ox-fest.org/uploads/1/3/1/4/131406275/9671805.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://cdn.shopify.com/s/files/1/0433/4085/7494/files/kagobotitodagusibis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0956/3045/files/skyrim_hd_texture_packs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/1484/1510/files/87438750348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/zerovamagewatoriko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7039/7339/files/bolinas_surf_report_magic_seaweed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/1884217702.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/63926444872.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6447/5304/files/nebinukigefokojuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/70625393363.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1300/5724/files/68602938054.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7994/2812/files/naming_alkanes_alkenes_alkynes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8983/6697/files/91953316313.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0316/6370/files/rubudurusafasevabobusi.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_off00004c36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C36 5336 bytes
SHA-256: e28bc5fe3c8c26deef5b5c27ba5742c6e4e179a7a8a272b9728bbdaebd208503
font_01_sfnt_off00005e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E2D 9396 bytes
SHA-256: 31e2698512c1812b3ed116a7702ace1265693d9693d10e8997eb1f75cd26816e
font_02_sfnt_off00007e64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E64 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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