Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec35cbb2040f600…

MALICIOUS

PDF

34.6 KB Created: 2020-10-15 00:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d06e9cd7394fdd3cfb2ab859d40b7164 SHA-1: b70fefddd1668d7a40790b49cb279149d25ce0d1 SHA-256: 7ec35cbb2040f6004256a5dfa917cf19afa63aa2a12213c06025d469a5f786d6
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://ggtraff.ru/123?keyword=joy+to+the+world+chords+guitar+pdf In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rugatu-rugot.pdfIn PDF document text
    • https://narogigadi.weebly.com/uploads/1/3/0/8/130874066/c2099e721b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f8703709f1be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f8769e7e0083.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f876310e1b66.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/4867245.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279037.pdfIn PDF document text
    • https://site-1038772.mozfiles.com/files/1038772/45625941044.pdfIn PDF document text
    • https://site-1039800.mozfiles.com/files/1039800/21750607054.pdfIn PDF document text
    • https://site-1040001.mozfiles.com/files/1040001/zuvazaxilepodudodo.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/1/0436/7751/5941/files/dunbar_armored_jobs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2574/3521/files/permata_yang_hilang_full.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2465/6802/files/borderlands_2_skins_krieg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/5269/9300/files/samsung_steam_washer_how_to_use.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/bam_bam_backlinks.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9893/7783/files/alter_table_add_column_oracle_default_value.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/9413/0085/files/amd_catalyst_install_manager_uninstall.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8827/2288/files/54360124500.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_off00004705.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4705 5600 bytes
SHA-256: dc8531dcb6ceb25386b0344e2613eedc3c1f5e2d116864992e8e95a195338881
font_01_sfnt_off00005a27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A27 9876 bytes
SHA-256: b526a6c83c0e6247c5fd958a4871ca335684c6bf7c064be34a4bd816b28a7b67

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