Malicious PDF — malware analysis report

Static analysis result for SHA-256 7702d37d9fa12327…

MALICIOUS

PDF

44.3 KB Created: 2020-09-30 03:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8d757dde400c5d36fcc8d018f76c33f6 SHA-1: 7fdf476bb8866075b80f1a507a4ec26fd5d46291 SHA-256: 7702d37d9fa12327e0d1a4c9914e71b400c4a51335900073498a28d46874a9c7
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://ggtraff.ru/strik?keyword=arduino+coding+manual+pdf In PDF document text
    • https://site-1037218.mozfiles.com/files/1037218/55010482107.pdfIn PDF document text
    • https://site-1036988.mozfiles.com/files/1036988/63714037673.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/29457635565.pdfIn PDF document text
    • http://divum.konhoffcompany.com/uploads/1/3/0/7/130738962/nevazatemefiliwame.pdfIn PDF document text
    • http://ruludo.baomsband.com/uploads/1/3/2/8/132814900/gosogopeban-zaserigoreg-xasux.pdfIn PDF document text
    • http://jofaven.thebonafideblonde.com/uploads/1/3/1/4/131406893/18cedd8445.pdfIn PDF document text
    • http://files.urbancreativity.org/uploads/1/3/2/7/132740541/d06d26f1.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/1/0438/4410/8445/files/cosmetics_types_and_uses.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8176/files/37076777395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7264/7331/files/16533693398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/2852/6742/files/ims_advanced_vocabulary_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8851/1130/files/bongo_flava_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mirizopenifipometetotagoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7404/3552/files/82476473377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6690/8065/files/jusok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/fundamental_of_computer_network.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/5989/4440/files/36080089288.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_off00006ea4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA4 5284 bytes
SHA-256: 69a558db812c7cbf0070896b496fd554d057bfd32655f607136f2f888e28aedf
font_01_sfnt_off0000808b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x808B 10552 bytes
SHA-256: 2877330e503b09e518c77ae14104376d386f997cc9049a765ce8ca25a1f87113

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