Malicious PDF — malware analysis report

Static analysis result for SHA-256 91f14c23001b261d…

MALICIOUS

PDF

62.6 KB Created: 2020-04-06 12:27:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-15
MD5: 531e651568864bd4310ada20748532fc SHA-1: 804ca26f1907892c1cac319542063dc03fba8919 SHA-256: 91f14c23001b261db310f4a0d569683b7a29d31ddcc1daed1269f8de55ef30f0
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution network. The document body, though heavily obfuscated, contains some of these URLs, indicating they are intentionally embedded. The primary purpose appears to be directing users to these external resources, which could host further malicious content or be used for SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://lavishcustomgifts.com/uploads/1/3/0/4/130476089/130476089.html#escudo+del+politecnico+nacional+del+callao PDF link annotation
    • http://waterfordepiclocations.com/uploads/1/3/0/3/130323424/xiwebifa_genipigikubupew.pdfIn PDF document text
    • http://timbrownvintagecamper.com/uploads/1/3/0/4/130483417/wunuwal.pdfIn PDF document text
    • http://sayorale.org/uploads/1/3/0/4/130435633/merurame-bijilol-punapelifawa-vibafamonaj.pdfIn PDF document text
    • http://sortng.com/uploads/1/3/0/7/130775267/1801420.pdfIn PDF document text
    • http://nokia-review.com/uploads/1/3/0/5/130588998/3917b111.pdfIn PDF document text
    • http://paulsfavoritestuff.com/uploads/1/3/0/7/130775276/piwox.pdfIn PDF document text
    • http://globalvenue.org/uploads/1/3/0/6/130621818/f35ed0.pdfIn PDF document text
    • http://gatorwedding.com/uploads/1/3/0/4/130491594/sapewufelupevo-mutonimefumofa-boruzebonigu.pdfIn PDF document text
    • http://mrsquam.com/uploads/1/3/0/9/130969260/rozotaw.pdfIn PDF document text
    • http://johnnypuckett.com/uploads/1/3/1/0/131070774/9af35.pdfIn PDF document text
    • http://xgripbands.com/uploads/1/3/0/6/130639235/8429254.pdfIn PDF document text
    • http://amethystretreatcenter.com/uploads/1/3/0/4/130475997/4210625.pdfIn PDF document text
    • http://coloradopallet.com/uploads/1/3/0/7/130776230/danisixusirave-didoxim-motafesakutiwe.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E9 11624 bytes
SHA-256: 368b62b684eccc5a039576405130898a8b2b5f79d921b41bd5690f1843a85e71
font_01_sfnt_off0000ccb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB5 2680 bytes
SHA-256: fe99f3cf5c22032b6a205105c04cca758faff213b63c29db5e8c872fe081e876
font_02_sfnt_off0000d644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD644 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

Open this report in the interactive analyzer, or submit your own file for analysis.