Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65b86e10b91ed0d…

MALICIOUS

PDF

65.9 KB Created: 2020-04-10 14:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1228f95d4c463a045bc5b72d21f50464 SHA-1: 3900192a35bb51d78e9f8495e9c74ec5652b8707 SHA-256: f65b86e10b91ed0dfe17873dc10219c095ce3da32149bc765f3247277c75defb
94 Risk Score

Malware Insights

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

The PDF file was flagged by an ML classifier as malicious. Static analysis revealed it functions as a link farm, containing numerous external URLs pointing to other PDF documents hosted on various domains. This technique is often used to obscure the ultimate malicious destination or to distribute malware through a chain of redirects.

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://burleypta.org/uploads/1/3/1/3/131379928/131379928.html#cuanto+tiempo+duro+la+conquista+de+mexico
    • http://oakislandhomeowners.org/uploads/1/3/0/4/130483737/1891041.pdf
    • http://robsvirtualretirement.com/uploads/1/3/0/8/130813325/ropodul-ginowavig-xexibujodaf.pdf
    • http://gofieldorgohome.com/uploads/1/3/0/7/130775660/7734291.pdf
    • http://betterfreightbrokerage.com/uploads/1/3/1/4/131453100/mogigorenub-tupezujekisoka-segud-fagewovimuw.pdf
    • http://gardentriunity.com/uploads/1/3/1/4/131438069/1739725.pdf
    • http://vapeeco.com/uploads/1/3/1/4/131452740/6095615.pdf
    • http://comiendosano.net/uploads/1/3/0/6/130604497/7138393.pdf
    • http://rmdrealestategroupllc.com/uploads/1/3/0/6/130605108/durifikatezutu_lesis.pdf
    • http://pineiroslandscaping.com/uploads/1/3/0/8/130814110/565041.pdf
    • http://arianastrickland.online/uploads/1/3/1/4/131407353/8922516.pdf
    • http://thehealthyhutshop.com/uploads/1/3/1/4/131438611/bazabovema.pdf
    • http://goldcrayonart.com/uploads/1/3/0/3/130324037/gasude.pdf
    • http://pncsportsconsulting.com/uploads/1/3/0/2/130287995/63441df9671bb5a.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6b8.bin
5caa0eb7606ecd7f5683d1b2047347a49c59872f37c1908f81005d8c6d074ca0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6B8 8656 bytes
font_01_sfnt_off0000d5cb.bin
885781ec91db75dc8c4a6a3d3dac0324bdfdb8f2239dab70466c62035ae072da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CB 4144 bytes
font_02_sfnt_off0000e2c1.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C1 16036 bytes

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