Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb4832818663d2c…

MALICIOUS

PDF

65.9 KB Created: 2020-08-19 12:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ba5b5c9ae5b8599b92439f4cf5f7f871 SHA-1: 7653ff32655544cdebd8598eba80279767f5705d SHA-256: 5fb4832818663d2c7bd738ebe4df4f137d27b5c9d2ee1d96c1b13f3dfb62c3eb
254 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, pointing to a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. The presence of a clipboard command lure suggests an attempt to trick the user into executing commands, further supporting a malicious intent.

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.
  • 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
  • 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.ru/pify?keyword=huntington+bancshares+annual+report+2018 In PDF document text
    • http://jibupenum.just-verandas.com/uploads/1/3/1/4/131408024/5480193.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/1/0431/5929/0022/files/nobivajojatafuxeteba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/bulawexogigabaveg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3301/5958/files/schengen_visa_form_word_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0028/2783/files/64570332321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4443/7144/files/nuzomekik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/poe_a_fixture_of_fate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3753/7942/files/biosocial_theory_dbt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9724/2262/files/91998982021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9848/9503/files/automotive_technician_resume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/xaxukabebemekewavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5697/2455/files/nevatidedokilaluta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4133/3147/files/padasomodebedetiru.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 4

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_off0000ba32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA32 5816 bytes
SHA-256: 5873e0e342466f482acbf9eb2bcc8bb2c3318d2506c608018bdddc7c44b5c621
font_01_sfnt_off0000cdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF1 14212 bytes
SHA-256: 7834993cb3d4bd04cdf91029dccdc8f4b34d9592823bcbc25c2e2d7e030531d3

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