Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91b9941201b813c…

MALICIOUS

PDF

66.6 KB Created: 2020-08-21 09:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4db524d3c2bf141635fb801c71f08f98 SHA-1: 5e282a018d57f327557cf0ab3cf09fc5028004ff SHA-256: f91b9941201b813ca6fb5c8e76b1b24f1dc4017780a47d891b464163df45dae6
202 Risk Score

Malware Insights

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

The PDF file contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'healthcare management services agreement template' and a URL that appears to be part of a link farm. These elements, combined with the 'SE_ADVANCE_FEE_SCAM_LURE' and 'SE_INVOICE_LURE' heuristics, strongly suggest an advance-fee scam or phishing attempt.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=healthcare+management+services+agreement+template In PDF document text
    • http://files.sfabsm.org/uploads/1/3/1/3/131383583/tesoruta.pdfIn PDF document text
    • http://files.carolinefreudenthal.com/uploads/1/3/1/8/131856476/levadenaxabizo-lubawamukamam-zilotur.pdfIn PDF document text
    • http://files.forthepeoplestl.org/uploads/1/3/2/6/132682758/gawumiwuj.pdfIn PDF document text
    • http://files.palmerdavidart.com/uploads/1/3/1/8/131856646/843985ba0b1ed.pdfIn PDF document text
    • http://files.redesignforwholefamilies.com/uploads/1/3/1/8/131857193/jowudakavesof-rusodisoton-zofokizubolas.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/1/0427/6954/7431/files/football_team_logos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/csf_rhinorrhea_cribriform_plate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4532/0861/files/66040110118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8284/1250/files/donuradaxamatepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3847/4397/files/89637777421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/56655156305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8403/6761/files/74714086890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2182/7239/files/fipabofozazosavivifika.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 8

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_off0000c785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC785 5368 bytes
SHA-256: 4a779f289bf1d5f4912021d1ea450e261e18029d72a27c08ff98fa2d79e2558a
font_01_sfnt_off0000d9a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A8 10364 bytes
SHA-256: aed4f0244c2f1eeeab89a339b256c5f4ecb3d0369b08b40c1e1130f528fd7155

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