Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b2929592e5cb5c4…

MALICIOUS

PDF

62.7 KB Created: 2020-09-13 16:06:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6d22dcdd072178671862f492bf5359c2 SHA-1: 23ce574d71fddbcb1dafb21cf05ace05fff24e7b SHA-256: 7b2929592e5cb5c4fa6d07373149962ee0c9fab559f5f8e322a5a0999b07ea2d
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.com/wix?keyword=service+contract+termination+letter+sample+doc In PDF document text
    • http://files.lawlorpainting.com/uploads/1/3/2/6/132682655/sepikasusebuzewi.pdfIn PDF document text
    • http://muwefurol.northgeorgiadaylilysociety.com/uploads/1/3/0/8/130814058/4b0c67.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/a640e9_edbc29f567c146c4b3d4ec1e60e10af2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/95b9ea_e3826810a4c440bead0b19034cd31f11.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fa32a6_653067619df243ac950cf39ef0cccb46.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/bae363_22e6e7b1e362477ca6bf05519475db4e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f5bc2a_838a85331a5249b7838809b99705ecba.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/35ddae_91289bd5ec024509a0483d4323b82d81.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/16a96a_dcbf40ce6dba4221860624a6bfee0061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0639/8364/files/91641433763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7417/5644/files/popaladifesariz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/sociologia_unam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4346/2037/files/badapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7232/3737/files/zukizageret.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_off0000aef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF5 2828 bytes
SHA-256: 85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f
font_01_sfnt_off0000b8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8EF 5380 bytes
SHA-256: 64f8ecd5e9dac268de0df19f8c1c537f53dc039908c63ce9b13616d009375de6
font_02_sfnt_off0000cb2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2A 9964 bytes
SHA-256: d21f85eb3cbaf9f587cc49be33e4d67e976983498681c8f6b019487e51351ef2

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