Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22a5ceb6d745811…

MALICIOUS

PDF

44.7 KB Created: 2020-08-11 18:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b9a65837ae54c9e7ced0fbd1e1eca478 SHA-1: 301a47bc0c1166ad6ec6b6c38e308738792b27b8 SHA-256: b22a5ceb6d745811c34b74d306ef8488b1def249e708f8114f840f965f5f0bbf
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.cc/pify?keyword=a+room+of+one+s+own+book+pdf In PDF document text
    • http://pugizo.kicministries.org/uploads/1/3/1/3/131383544/6cc7a1ee09.pdfIn PDF document text
    • http://files.support4sdrwales.org.uk/uploads/1/3/1/4/131409526/relafe.pdfIn PDF document text
    • http://vanog.spikeofalltrades.com/uploads/1/3/1/4/131483200/sezerexakebiwod-valet-serije-gamaguwo.pdfIn PDF document text
    • http://files.sarahmansfieldphotography.com/uploads/1/3/1/4/131438847/xiwekesibupa-powekoxezomumud-rudejepan-gebegefojena.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/1/0431/0011/1009/files/davozidudajekaralokikoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7990/9030/files/xazuvaboti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7002/9975/files/16314968480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9549/0721/files/taturuzosomedefabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4980/3162/files/patofisiologi_bendungan_asi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1708/4833/files/mac_uninstall_mysql.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9234/2939/files/2011_dodge_grand_caravan_repair_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8544/7833/files/35525392958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/29366970459.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4256/9368/files/53196714677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0138/7936/files/tapaberuzexop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/tikugi.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_off00006499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6499 4888 bytes
SHA-256: dc6f0f6d9fe23d522b1218f7bada0550732b28acf32d89346f56a16f916c583a
font_01_sfnt_off00007517.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7517 10192 bytes
SHA-256: e8bacc8da328239585372d8647fa609307274f648aa34e572f0043d44288a702
font_02_sfnt_off000097ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97EE 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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