Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d982577a1e8c6eb…

MALICIOUS

PDF

51.0 KB Created: 2020-10-26 01:12:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 59d300538613add24796c8c0fcb8af6e SHA-1: 358ac1d05460b494d80fc6f82362563b666f3965 SHA-256: 7d982577a1e8c6eb7b56faeceed7ca2c10c87aa1a23cdb5fd0927dbcae9467fa
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=sistema+de+clasificacion+bethesda+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5f94276425a2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386842/normal_5f921455e1188.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5f8e06e82ce6c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/de388b96-d8a6-4a96-a954-6b63d1ad7e1f/65234621877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cb5ef25-45b2-4400-9ac8-79f1601f92ad/71354964686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ccd9cd-20bf-4cf1-a0a1-888214bb5502/47178637669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5516/4821/files/13431963580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6601/5395/files/asterisk_pbx_installation_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2150/7997/files/map_of_canada_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2744/8476/files/minecraft_apk_2018_mediafre_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7434/7693/files/73346720303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/lotoziwuniladaratu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/5272/8230/files/9_gaya_kepemimpinan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/1084/8406/files/73916750912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/0677/1356/files/wait_for_me_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d8e8809-c943-47b1-836b-32b72c731b60/8178626267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c507f29-0d0c-4862-b77e-48e78d592b96/vazasawawanubirigedapekod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51fab123-4654-4f68-8e25-fb6653d26cf9/89330064846.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/362d91b7-7155-4956-83ba-e608c7762892/21451347015.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72553f5d-326e-49bf-b0fd-bc345f6bbab0/58257109092.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_off000083ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83BA 5544 bytes
SHA-256: 3c907f0ef7c7d149fec88c6fa0e04a44d144fc426b0ce211a3ecd456f2921c5d
font_01_sfnt_off0000965a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x965A 11772 bytes
SHA-256: 91bc74488277c4934ea2ef46d2d6ec85a4000ec6fb330ece2ec103a24c9cd005

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