Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b6be7f576ea76d…

MALICIOUS

PDF

46.2 KB Created: 2020-07-28 19:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1c4215409ff911225a6a2ca8c8ec743c SHA-1: d1247bf0541fd2c917c71fce48ae74306a86a56f SHA-256: 21b6be7f576ea76d264b875102f5cae547b6f0b24fffcf5cb554d10c3d0c2a7a
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a lure related to a 'nationality checking service' and includes a link to a known malicious redirector. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs. The presence of a callback phishing lure further supports the malicious intent. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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.cc/pify?keyword=nationality+checking+service+birmingham+form In PDF document text
    • http://files.mx.catalinapacificunderground.com/uploads/1/3/1/4/131406337/wipuwazofope.pdfIn PDF document text
    • http://files.pegenter.com/uploads/1/3/1/4/131453536/9074807.pdfIn PDF document text
    • http://files.flambeauagzone.org/uploads/1/3/1/8/131871704/8275735.pdfIn PDF document text
    • http://files.mrelisara.com/uploads/1/3/1/8/131871762/nafagija-rarifilamib-gezagew.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/1/0430/8962/5250/files/pejebamapovap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3484/5079/files/xuwifobado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/98465045403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4083/2678/files/91282570889.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0884/2152/files/xunofobodafawole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/42109658058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/saveraza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51191810805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7905/7056/files/19234398032.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7603 5416 bytes
SHA-256: 25c8fd89fef578afd91826c1d04f846e2389fcba57eee7946b05bffe33313508
font_01_sfnt_off0000884e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x884E 10272 bytes
SHA-256: 9deaa26055e404e211a6290590b82d50d5bdf7bca5829a38420666114cf907ea

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