Malicious PDF — malware analysis report

Static analysis result for SHA-256 73ded31d0473b3c5…

MALICIOUS

PDF

35.8 KB Created: 2020-03-30 13:44:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 93e031cc7128db11ed9258bcf8e7b533 SHA-1: 23b4eba4f865525b683162f8d9d50dc387572f8b SHA-256: 73ded31d0473b3c5b9b4ecdb3eec4383f0aa81ea05d2a49caba9efc2a1ddb8c2
62 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs hosted on similar domains. The document body text, though garbled, includes a reference to 'medical surgical nursing 10th edition study guide answers', suggesting a lure to trick users into visiting these links. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO manipulation or to host malicious content. No scripts were extracted from this sample.

Heuristics 3

  • 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
  • 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://juliejesternewman.com/uploads/1/3/1/3/131383889/131383889.html#medical+surgical+nursing+10th+edition+study+guide+answers
    • http://drazenbuntic.com/uploads/1/3/1/3/131398322/4632577.pdf
    • http://calvinhawkins.net/uploads/1/3/0/3/130323322/b7a439a1fb6609c.pdf
    • http://thetimebetweenis.org/uploads/1/3/0/7/130738646/a212223.pdf
    • http://mysteriousancestor.com/uploads/1/3/0/7/130739190/xizerimewosevawol.pdf
    • http://wmscomputing.com/uploads/1/3/0/8/130874318/xuzit-kazifawo.pdf
    • http://funlifephotobooth.com/uploads/1/3/0/7/130775653/kefunamajekejuv_rokev_xebamij.pdf
    • http://keepofthegrassproductions.com/uploads/1/3/0/7/130776474/kudumixopelutimed.pdf
    • http://candicemoss.com/uploads/1/3/0/5/130544687/vozumejipe_sefas_zoguwawum_bawadeleku.pdf
    • http://moonlightplanners.com/uploads/1/3/0/8/130874012/memalo.pdf
    • http://centerstatesports.com/uploads/1/3/0/9/130969750/fesiz_wubapopaveniji_lokujon.pdf
    • http://abmultiservices.fr/uploads/1/3/0/5/130550974/9b20a.pdf
    • http://africha.com/uploads/1/3/0/3/130379625/6acf26d1f.pdf
    • http://mivux.ch/uploads/1/3/0/5/130541733/910546.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006202.bin
1d4901ac77e94b3e694143a48f664faed51dab2dc3d407914cdde70ded004703		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6202 7676 bytes

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