Malicious PDF — malware analysis report

Static analysis result for SHA-256 1984678590197138…

MALICIOUS

PDF

45.0 KB Created: 2020-11-07 10:33:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 469d62a795cdbd06e0c9c48d38fc80ad SHA-1: a5d44747a66514051130b73567f4712cbae492cc SHA-256: 198467859019713837c945fc72cec23f9c4b800db2182a1654c3ea2764b1dbb6
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/123?keyword=cole+sanderson+wrestling PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5f8d44e90bc69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454302/normal_5f9fd2d861b7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393020/normal_5fa2b5008f80d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f8b3ab519aea.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://rajoxaje.files.wordpress.com/2020/11/mystery_of_the_long_lost_8th_9th_and_10th_books_of_moses.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/xunarigufugaxokad.pdfIn PDF document text
    • https://deperizive.files.wordpress.com/2020/11/visakobexixis.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/california_consumer_protection_act.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b984651-0fd9-4dcc-b453-fbc85a0923db/18150067394.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/panumuma.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/13910968694.pdfIn PDF document text
    • https://pupirod.files.wordpress.com/2020/11/sagob.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/jutinizisevawu.pdfIn PDF document text
    • https://wejogude.files.wordpress.com/2020/11/niwasegini.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_off0000649c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649C 4896 bytes
SHA-256: 301fc94b27146df3ec22fc6d41466dc3ca7179ddd181c217b2602d7610bb8484
font_01_sfnt_off0000755b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x755B 10568 bytes
SHA-256: 438916f4ae7437c778be3fc4ad45aa3e01831d1f0962f1f54a422724775cbfe3
font_02_sfnt_off00009996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9996 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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