Malicious PDF — malware analysis report

Static analysis result for SHA-256 be93aff363848156…

MALICIOUS

PDF

44.1 KB Created: 2020-10-04 09:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 603b93f1e4b70b4ffd7d1bd9ca13ef54 SHA-1: a62824dbda7ea115b100290edc6dc4846206021b SHA-256: be93aff363848156bfc885136adac9c005927d617d0dff3362a4d578aabed405
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.club/pify?keyword=gangstar+rio+city+of+saints+mod+apk+download+revdl In PDF document text
    • http://korajebu.eatvillagepizza.com/uploads/1/3/2/6/132681947/0091c5b721060.pdfIn PDF document text
    • http://files.edmundalynjones.com/uploads/1/3/1/6/131606502/zewupafisezuraj.pdfIn PDF document text
    • https://site-1036627.mozfiles.com/files/1036627/1983917830.pdfIn PDF document text
    • https://site-1038861.mozfiles.com/files/1038861/vugetosi.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/1/0483/8067/4197/files/microsoft_wireless_keyboard_800_not_working.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2638/5576/files/matokixikazetipenebagozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/osrs_family_crest_quick_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4811/5610/files/limumipurefametabakosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/5541/8021/files/kiniri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/5123/3692/files/56588968033.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9280/7331/files/community_cloud_trailhead.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8768/1952/files/takstar_sgc-598_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9503/9386/files/baldwin_upright_piano_price.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2725/7749/files/cooks_essentials_electric_pressure_cooker_manual.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_off00006c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C93 5824 bytes
SHA-256: 8e13d0979c09869192c53b3958de2068e50741de9e304b10c6cd506eae2af919
font_01_sfnt_off00008081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8081 10060 bytes
SHA-256: 47810905788a1025691b6610af0f793b1a3457d05b7d04abe5de05db5f351e1d

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