Malicious PDF — malware analysis report

Static analysis result for SHA-256 470c23bc61ce5804…

MALICIOUS

PDF

36.7 KB Created: 2020-06-14 20:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 54fba22c55598d56b15bf6b4bcc6d36a SHA-1: 752364519bb15fffb5c4add8481e37402768a8a5 SHA-256: 470c23bc61ce580466ae2e7a5056d470abd24010a0c831f40583d6b5b1113b0b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links to various domains, many of which appear to be part of a link farm. The primary heuristic indicates a 'PDF_SEO_LINK_FARM' which suggests the document's purpose is to generate traffic or redirect users to a network of other PDF files. The embedded document body text, though partially corrupted, mentions 'Staffing worksheet template', which could be a lure. No scripts were extracted from this sample.

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://canceltimeshare.net/uploads/1/3/1/8/131856669/131856669.html#staffing+worksheet+template PDF link annotation
    • http://mta-sts.mail.bigdoglabradoodles.com/uploads/1/3/1/3/131380213/5594173.pdfIn PDF document text
    • http://gamecourtsupply.com/uploads/1/3/1/6/131637034/meninosesemuvonam.pdfIn PDF document text
    • http://liinkshuttle.com/uploads/1/3/0/5/130546880/e225b053b6c712d.pdfIn PDF document text
    • http://wooshspeed.com/uploads/1/3/0/4/130488914/81b15.pdfIn PDF document text
    • http://eaglesnestconsulting.com/uploads/1/3/2/3/132303035/pokunuxavewu.pdfIn PDF document text
    • http://mysupplyguyatl.com/uploads/1/3/0/9/130969847/dizovi-wugosaxef-dutosurezab-guwup.pdfIn PDF document text
    • http://condoinvestment.ph/uploads/1/3/0/5/130550914/d7a503a3f.pdfIn PDF document text
    • http://hannysplace.com/uploads/1/3/0/8/130874120/a8da47118063.pdfIn PDF document text
    • http://youthdreambig.com/uploads/1/3/1/4/131406867/wagikeduburaw_dikilojid_sosamulawibomez_kitanetakixil.pdfIn PDF document text
    • http://globalnationalfunding.com/uploads/1/3/0/9/130969411/2440354.pdfIn PDF document text
    • http://tylerwaterwells.com/uploads/1/3/1/4/131452800/birorugesexov_lunapogok_futal_xidusa.pdfIn PDF document text
    • http://johscatering.com/uploads/1/3/0/6/130603851/1683044.pdfIn PDF document text
    • http://seethroughpodcast.com/uploads/1/3/1/4/131482833/xunonudefikofube.pdfIn PDF document text
    • http://gordonking.photography/uploads/1/3/0/8/130874320/tivelenunulagikosoru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ligarupature.files.wordpress.com/2020/06/tizovesamizatuxi.pdfIn PDF document text
    • https://xukitivusapu.files.wordpress.com/2020/06/vasimutotiwamefosodaxe.pdfIn PDF document text
    • https://gotexutag798502486.files.wordpress.com/2020/06/vepajamabuwuxa.pdfIn PDF document text
    • https://jekoketobi.files.wordpress.com/2020/06/90499471833.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62CB 10124 bytes
SHA-256: 774dc0f7db800aeed8575c968171439444e263e16eb106e05af76eb7a80915d6

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