Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b66c16ec1408db3…

MALICIOUS

PDF

43.7 KB Created: 2020-08-17 08:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 194d751189ac401b4afd6ff93478bea9 SHA-1: afd179a0f13c3db8f3ac394c80e69c7f8bf2ec6c SHA-256: 0b66c16ec1408db37a8d9346ae4ca42dde18a3744a1de5a1b0a5a128242fb4bb
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous embedded links, many pointing to a redirector service, suggesting a phishing or malware distribution campaign. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs users to copy/paste content into a shell, a common tactic for executing malicious commands. The ML classifier also strongly flagged this PDF as malicious.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.ru/pify?keyword=docker+toolbox+windows+guide In PDF document text
    • http://juvef.hollyebony.com/uploads/1/3/1/4/131406390/eaa90aef662fc.pdfIn PDF document text
    • http://files.donnaliberalistore.com/uploads/1/3/1/4/131406149/27e05cb0bfb.pdfIn PDF document text
    • http://files.fiveanimalkenpo.com/uploads/1/3/1/3/131378950/9462352.pdfIn PDF document text
    • http://files.mrallansciencegfc.com/uploads/1/3/1/1/131164440/mekituwiduw.pdfIn PDF document text
    • http://nanukum.calas-ct.org/uploads/1/3/1/1/131164239/wujefusap.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/1/0430/6334/5301/files/bolokikapejo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/siwanolusamupijatewopatub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5335/7985/files/wolapepaduj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3552/5282/files/imaginary_numbers_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3990/6197/files/19990052110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9334/3912/files/conan_exiles_crafting_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/90017515423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6446/6335/files/eserciziario_analisi_logica_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5253/8787/files/bhaktamar_stotra.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/wimsatt_beardsley_intentional_fallacy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9728/3996/files/70339671371.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 6

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_off0000650a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x650A 5260 bytes
SHA-256: 8d31b40d74094f722226b58277dcf692a5d7e5288fdcab407e56a4312b775177
font_01_sfnt_off0000770b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x770B 13528 bytes
SHA-256: a056856a4a7b07df536428a9de679f83d5dbe2766f210d65a9f5cfc67740e799

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