Malicious PDF — malware analysis report

Static analysis result for SHA-256 c425be0e8b64e15d…

MALICIOUS

PDF

43.7 KB Created: 2020-03-24 19:45:47 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 367d4425470de6143faaca788fbcbf2c SHA-1: 4803212da145f86b97e5712b2dedc3d396be3ada SHA-256: c425be0e8b64e15d59faf442329fd381f83538660765448a2bf903e3bc47db03
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs hosted on similar domains. This pattern is indicative of a link farm, often used for SEO manipulation or to distribute malicious content. The ML classifier strongly supports the malicious nature of this PDF. 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://naturaltolife.com/uploads/1/3/0/8/130874413/130874413.html#how+to+tie+a+hijab+scarf
    • http://fynnad.store/uploads/1/3/0/7/130776312/8518042.pdf
    • http://www.topluminosity.org/uploads/1/3/0/5/130588961/bawewomoda.pdf
    • http://ayayogaart.com/uploads/1/3/0/7/130740591/721825.pdf
    • http://glendalemenssuit.com/uploads/1/3/0/5/130589128/1503017.pdf
    • http://techreb.com/uploads/1/3/0/5/130551457/3bdb6d6cf1d4.pdf
    • http://www.heatllc.net/uploads/1/3/0/3/130313319/sapikupuraboxaked.pdf
    • http://soulbodyhealth.com/uploads/1/3/0/5/130588878/wexome_jufaw.pdf
    • http://kidsbypatri.com/uploads/1/3/0/8/130813366/6db2610.pdf
    • http://treehousehashomes.com/uploads/1/3/0/5/130589049/194ff731583d3b.pdf
    • http://maureenallenlandscapes.com/uploads/1/3/0/4/130483895/wezowasagomova_wekir_rupigibaxanegap.pdf
    • http://www.katherinebellows.com/uploads/1/3/0/6/130639081/tamomebejizul.pdf
    • http://mnroofingexteriors.com/uploads/1/3/0/5/130540926/dazitunaf-wuzaku-nanagakamevojed-xafagawos.pdf
    • http://expopul.com/uploads/1/3/0/5/130539366/nowafofisuz.pdf
    • http://marisakellywellness.com/uploads/1/3/0/5/130588417/606dc95c.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a2f.bin
9a34be778028c631d1481cc718267b8ec1f765e50d5a1c48406c508519639040		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A2F 7188 bytes
font_01_sfnt_off00009675.bin
1b3f82cd74c5b6671cc0c0d4a6c7877b74bb57ca469b2a61ef541918e41af838		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9675 2652 bytes

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