Malicious PDF — malware analysis report

Static analysis result for SHA-256 726fce5d376ac9c0…

MALICIOUS

PDF

41.6 KB Created: 2020-10-05 22:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-11
MD5: a1c315ac16b606241d213c95a97813fe SHA-1: 0c9f0eaa57f38e49fca5696b52ffd846f241ce22 SHA-256: 726fce5d376ac9c02dd9e425956dddf4651e43c5acf1864fe5c2401ed8a1bb8b
274 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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/strik?keyword=online+virtual+ti-+84+graphing+calculator In PDF document text
    • http://files.buildingdecarb.org/uploads/1/3/2/6/132695535/kazawob_kirajaxa.pdfIn PDF document text
    • http://files.curvygirlzplus.shop/uploads/1/3/0/7/130775334/5eb564eb18.pdfIn PDF document text
    • http://vapisoz.mauimadison.com/uploads/1/3/0/8/130814328/xudedesiluzu_dozejaluxovomog_pemegexorijaza.pdfIn PDF document text
    • http://files.bayswatercitysaintsnetball.club/uploads/1/3/1/4/131437987/e85fb.pdfIn PDF document text
    • http://xaviwa.aerialdancemarin.com/uploads/1/3/1/4/131437919/jidivonisavekuxede.pdfIn PDF document text
    • http://files.eloyjrojas.com/uploads/1/3/1/6/131637679/ce6b7d4.pdfIn PDF document text
    • http://files.integratedveterinarypathologybyalexandrabrower.com/uploads/1/3/0/9/130969186/puwavivim-jebosivaxotulo.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006465.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006465.bin)
    • https://cdn.shopify.com/s/files/1/0431/2766/8890/files/74444407874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/troy_bilt_2700_psi_pressure_washer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8101/0851/files/wujovug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1181/6099/files/momentum_and_impulse_worksheet_answers_9.1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92599e27-6ebd-4cbd-9020-83cc373e004d/jofozunepobuwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b723d75d-0c47-4b6b-9348-024dcde1d272/86654412713.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_off00006465.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006465.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6465 5416 bytes
SHA-256: 59d27ea90decb9d3eb838298f868195509c50fc0ef91cb00bb2445d34f9920e4
font_01_sfnt_off000076e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76E1 10016 bytes
SHA-256: 54e4130c342e0ab7abe8b135a5dd742ad047cff85da433e43a9ba10d56318e7d