Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c847b46a0f146ee…

MALICIOUS

PDF

42.7 KB Created: 2020-10-28 20:54:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 583785d969858f55e76af253e3744feb SHA-1: cea6cf04f02a530cb48e1b7275ca6cbf958a3c83 SHA-256: 5c847b46a0f146ee4b53622e9179bc633a8873fae59b7464fbd65ac03f5b6c4d
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://cctraff.ru/aws?keyword=pana+unit+8 In PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/xekivajuwu-zavekuwibudivi-mafaduwasewa-fizaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_5f8e2884302cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379968/normal_5f93fff7577d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f962ebe08626.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/zuvikezap_xokutokobabadi.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006c3a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006c3a.bin)
    • https://cdn.shopify.com/s/files/1/0484/1701/3912/files/fiwusofumogomiluvidusas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8361/9232/files/nafixazinuvozobixol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d388a35f-c0fd-47d4-a491-4b04bfa04bd5/34643035833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4247/9007/files/manual_rotary_vegetable_slicer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2289/1187/files/33725880356.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4653fb60-a814-4c30-bcc4-e5faac68b368/gunofulotuzenizoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3109564-2c55-469a-bb82-1b96aee82bec/40645736073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/5819/9204/files/new_romantic_urdu_novels_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5693/4297/files/84583912890.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 extracted file (font_00_sfnt_off00006c3a.bin)

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3A 4568 bytes
SHA-256: 2c108fb1e666d0da26dfd8728c582692b0b6d23abe7951580f7771d9fef21ddf
font_01_sfnt_off00007bd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD7 10056 bytes
SHA-256: 9f1b880259bd5a4aea76537c0e7be2b46583ccd27c0427b7e4e7876360802cf7

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