Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1af01e79b4680d…

MALICIOUS

PDF

73.1 KB Created: 2021-01-01 05:18:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-31
MD5: f1703ccafca4978ba4f52a8fb876b3c7 SHA-1: 9661cac469afa007e921fd4c32cf80f20cc8c87b SHA-256: 5a1af01e79b4680daedf8a3c0bc38f8d73d07f1945078824f2c650746de49f16
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wb?keyword=science%20journalism%20jobs%20canada In PDF document text
    • https://cdn.sqhk.co/netesatova/gchaBic/99028076466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_5fe8f599b0e91.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/YH4QIok/pixel_army_base_shooter_mining.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501028/normal_5fbe3bb93cc21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388841/normal_5f8d8f7793a15.pdfIn PDF document text
    • https://nexajatolotol.weebly.com/uploads/1/3/4/3/134308242/rusekewosikoz.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/137d5044-d9bd-497f-9215-f942bd298f2e/xodamilafupinive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b8efde4-1376-4a2b-9fdd-1a52766729ea/vijigoda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d302402c-b658-4d9b-b85d-3d998dbb0960/37832800279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9b50c1d-c03b-4ee4-864c-122f933053a3/software_architecture_with_spring_5._0_download.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_off0000df5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5A 5404 bytes
SHA-256: e4e0ea78224d7bf4b6c21772a66496c7682099b42af6d41fe56ad12ce8d9800c
font_01_sfnt_off0000f1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A4 11324 bytes
SHA-256: e33e932b8d45caa94dda6f8914e41056eb573bb6e55c8a12e74c3f6a082cae06