Malicious PDF — malware analysis report

Static analysis result for SHA-256 4148007176f304cf…

MALICIOUS

PDF

39.1 KB Created: 2020-05-16 03:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 902083edadfc53ab35661868998a55cd SHA-1: 5aa669607992bcd33dc1ca23d6ebce1e821f3e70 SHA-256: 4148007176f304cf12745e72e09dcc500c5f6e4a20cb999b10e304964cb65ae3
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link T1566.002 Spearphishing Attachment

The PDF document contains a large number of external links, many pointing to other PDF files, suggesting a link farm or SEO poisoning tactic. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content likely prompts the user to install a browser extension or update. This is a common social engineering technique to trick users into downloading malicious software or revealing credentials. No scripts were extracted from this sample, limiting further analysis of its direct execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://puttwellgolf.net/uploads/1/3/0/6/130604314/130604314.html#best+adblock+for+android+tablet PDF link annotation
    • http://osidetiger.com/uploads/1/3/1/4/131453276/wezozevuvoxosomakojo.pdfIn PDF document text
    • http://redoandrenewlv.com/uploads/1/3/0/2/130287401/5646241.pdfIn PDF document text
    • http://eco-techsolution.com/uploads/1/3/0/6/130620228/6e94662d710fd.pdfIn PDF document text
    • http://stephengilardi.com/uploads/1/3/0/9/130969726/3563030.pdfIn PDF document text
    • http://horseford.org/uploads/1/3/0/5/130588509/9761483.pdfIn PDF document text
    • http://clipartalacarte.com/uploads/1/3/0/7/130775682/9234997.pdfIn PDF document text
    • http://theedladder.com/uploads/1/3/0/4/130483480/4326476da.pdfIn PDF document text
    • http://osullivanfitness.com/uploads/1/3/0/5/130551001/rudulegitife-vigezulidaf-butifozej-sewinaximexub.pdfIn PDF document text
    • http://seniorcordfree.com/uploads/1/3/0/3/130379676/zedosizovume_farutatudat.pdfIn PDF document text
    • http://killtheherogame.com/uploads/1/3/0/3/130323656/c66a1182d3.pdfIn PDF document text
    • http://jarrods.org/uploads/1/3/0/8/130813883/jenijuwawa.pdfIn PDF document text
    • http://probateinsacramento.com/uploads/1/3/0/6/130639428/4206358.pdfIn PDF document text
    • http://d3alder.com/uploads/1/3/0/5/130542859/buzagenu_leravodu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCF 10444 bytes
SHA-256: dea79e1b87e2878f60932733010d56db1cea0d22f9b4cca3ab0d86f7981faab6

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