Malicious PDF — malware analysis report

Static analysis result for SHA-256 0053b478e623ea85…

MALICIOUS

PDF

46.3 KB Created: 2020-03-09 02:51:00 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7ce7685a3ce6fcae5ed3b315f114ddc6 SHA-1: 48c57bb727da2f78584ab08377ea230caa30c918 SHA-256: 0053b478e623ea85eaa9d3162e1f3095053666e2ec35de7ff9e569adc11b1218
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a tactic to manipulate search engine results or distribute malicious content. The embedded URLs point to various domains, likely serving as a distribution network for further malicious payloads or phishing content. The ML classifier strongly flagged this PDF as malicious.

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://ftx7t.slpny.com/uploads/1/3/0/2/130287939/130287939.html#impact+of+globalisation+essay+pdf
    • http://www.pjscafeteriaandcatering.com/uploads/1/3/0/8/130813855/7984740.pdf
    • http://music4ads.com/uploads/1/3/0/6/130621382/f7ab69.pdf
    • http://smartliftvest.net/uploads/1/3/0/6/130639575/0650beb185.pdf
    • http://escaperoomenthusiast.com/uploads/1/3/0/7/130739155/nikobumotano-pixarobopijiku-buredekut.pdf
    • http://www.thetreasureshack1234.com/uploads/1/3/0/6/130622007/7052318.pdf
    • http://pshotatlanta.com/uploads/1/3/0/7/130740624/1522922.pdf
    • http://cityhaul.net/uploads/1/3/0/2/130272340/ninutux.pdf
    • http://carlysutherland.com/uploads/1/3/0/6/130621868/nexudunosu.pdf
    • http://modish716.com/uploads/1/3/0/4/130476024/c3054b45.pdf
    • http://tridevils.de/uploads/1/3/0/7/130739132/0aae8a32581a.pdf
    • http://ccmarketing.ie/uploads/1/3/0/6/130605302/jurujemoji.pdf
    • http://mx.southernoregondrone.net/uploads/1/3/0/4/130435884/fotademam.pdf
    • http://www.christiancouplescottage.com/uploads/1/3/0/4/130435873/balisilijasi-nutuku.pdf
    • http://www.rem5mn.com/uploads/1/3/0/2/130287895/jefexenenifenoru.pdf
    • http://abject-adventures.com/uploads/1/3/0/3/130379474/mupof.pdf
    • http://landscapeequipmentrentals.com/uploads/1/3/0/7/130740044/3096f5e9db0c.pdf
    • http://breaking-through.com/uploads/1/3/0/2/130287835/7938382.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_off00008c4d.bin
efa560408cc35642d0041f64022f21ea079a3e0923186a287667597269f7eaaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4D 7688 bytes

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